Relevant bibliographies by topics / Indicators of hydrologic alteration

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Indicators of hydrologic alteration'

Author: Grafiati
Published: 4 June 2021
Last updated: 8 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Indicators of hydrologic alteration.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Indicators of hydrologic alteration"

1

Gao, Yongxuan, Richard M. Vogel, Charles N. Kroll, N. LeRoy Poff, and Julian D. Olden. "Development of representative indicators of hydrologic alteration." Journal of Hydrology 374, no. 1-2 (July 2009): 136–47. http://dx.doi.org/10.1016/j.jhydrol.2009.06.009.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Park, Bong-Jin, Ki-Ho Kang, and Kwan-Sue Jung. "Hydrologic Regime Alteration Analysis of the Multi-Purpose Dam by Indicators of Hydrologic Alterations." Journal of Korea Water Resources Association 41, no. 7 (July 31, 2008): 711–23. http://dx.doi.org/10.3741/jkwra.2008.41.7.711.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Mahmoodi, Nariman, Jens Kiesel, Paul D. Wagner, and Nicola Fohrer. "Spatially distributed impacts of climate change and groundwater demand on the water resources in a wadi system." Hydrology and Earth System Sciences 25, no. 9 (September 21, 2021): 5065–81. http://dx.doi.org/10.5194/hess-25-5065-2021.

Full text
Abstract:
Abstract. Understanding current and possible future alterations of water resources under climate change and increased water demand allows for better water and environmental management decisions in arid regions. This study aims at analyzing the impact of groundwater demand and climate change on groundwater sustainability and hydrologic regime alterations in a wadi system in central Iran. A hydrologic model is used to assess streamflow and groundwater recharge of the Halilrood Basin on a daily time step under five different scenarios over the baseline period (1979–2009) and for two future scenario periods (near future: 2030–2059 and far future: 2070–2099). The Indicators of Hydrologic Alteration (IHA) with a set of 32 parameters are used in conjunction with the Range of Variability Approach (RVA) to evaluate hydrologic regime change in the river. The results show that groundwater recharge is expected to decrease and is not able to fulfill the increasing water demand in the far future scenario. The Halilrood River will undergo low and moderate streamflow alteration under both stressors during the near future as RVA alteration is classified as “high” for only three indicators, whereas stronger alteration is expected in the far future, with 11 indicators in the high range. Absolute changes in hydrologic indicators are stronger when both climate change and groundwater demand are considered in the far future simulations, since 27 indicators show significant changes, and the RVA shows high and moderate levels of changes for 18 indicators. Considering the evaluated RVA changes, future impacts on the freshwater ecosystems in the Halilrood Basin will be severe. The developed approach can be transferred to other wadi regions for a spatially distributed assessment of water resources sustainability.
APA, Harvard, Vancouver, ISO, and other styles
4

Panagopoulos, Yiannis, Kostas Stefanidis, Marta Faneca Sanchez, Frederiek Sperna Weiland, Rens Van Beek, Markus Venohr, Lidija Globevnik, Maria Mimikou, and Sebastian Birk. "Pan-European Calculation of Hydrologic Stress Metrics in Rivers: A First Assessment with Potential Connections to Ecological Status." Water 11, no. 4 (April 5, 2019): 703. http://dx.doi.org/10.3390/w11040703.

Full text
Abstract:
The hydrologic regime of a river is one of the factors determining its ecological status. This paper tries to indicate the present hydrologic stress occurring across European rivers on the basis of model integration. This results in a pan-European assessment at the resolution of the functional elementary catchment (FEC), based on simulated daily time-series of river flows from the model PCR-GLOBWB. To estimate proxies of the present hydrologic stress, two datasets of river flow were simulated under the same climate, one from a hypothetic least disturbed condition scenario and the second from the anthropogenic scenario with the actual water management occurring. Indicators describing the rivers’ hydrologic regime were calculated with the indicators of hydrologic alteration (IHA) software package and the river total mean flow and the relative baseflow magnitude over the total flow were used to express the deviations between the two scenarios as proxy metrics of rivers’ hydrologic alteration or hydrologic stress. The alteration results on Europe’s FEC-level background showed that Southern Europe is more hydrologically stressed than the rest of Europe, with greater potential for hydrology to be clearly associated with river segments of unreached good ecological status and high basin management needs.
APA, Harvard, Vancouver, ISO, and other styles
5

Xu, Guanglai, Youpeng Xu, Xian Luo, Hongliang Xu, Xiaohua Xu, and Chunsheng Hu. "Temporal and spatial variation of water level in urbanizing plain river network region." Water Science and Technology 69, no. 11 (March 15, 2014): 2191–99. http://dx.doi.org/10.2166/wst.2014.133.

Full text
Abstract:
As one of the most developed regions in China, the plain of East China is undergoing gradually increased flooding under the obvious urbanization process. This paper mainly analyses the trend of water level time series in the region during the past decades, and assesses the temporal and spatial variation of water level and indicators of hydrological alteration. The results show that there is a trend of increasing water level. Bigger slope and higher significant level can be observed in monthly minimum than in monthly maximum water level, in peri-urban than in urban areas. Meanwhile, it is observed that the mean monthly minimum and maximum water level increased in both urban and peri-urban regions, while decreased coefficients of variation (Cv) in urban and increased Cv in peri-urban regions were calculated. Most indicators of hydrologic alteration in urban stations are concentrated to the range of variability approach target, while most indicators are discrete in peri-urban stations. And the degree of hydrologic alteration is higher in peri-urban than in urban regions.
APA, Harvard, Vancouver, ISO, and other styles
6

Du, Jiakai, Xushu Wu, Zhaoli Wang, Jun Li, and Xiaohong Chen. "Reservoir-Induced Hydrological Alterations Using Ecologically Related Hydrologic Metrics: Case Study in the Beijiang River, China." Water 12, no. 7 (July 15, 2020): 2008. http://dx.doi.org/10.3390/w12072008.

Full text
Abstract:
Anthropogenic activities have a tremendous impact on water ecosystems worldwide, especially in China. To quantitatively evaluate the hydrological alteration connected with aquatic lives and river ecological risks, we took the Beijiang River located in South China as the case study and used ecosurplus (defined as ecological carrying capacity exceeding ecological consumption)/ecodeficit (defined as ecological consumption exceeding carrying capacity) and Indicators of Hydrological Alterations to evaluate hydrological changes. The Ecologically Relevant Hydrologic Indicators were employed to select the key indices of Indicators of Hydrological Alterations, and the eco-environmental water demand calculation provide an effective way for the reservoir operation. Results showed that: (1) High flows contributed more to the ecodeficit, while low flows contributed more to the ecosurplus; (2) the ecodeficit in some parts of the river basin might exceed the ecosurplus after reservoir construction, especially along the main stream; and (3) the determination of eco-environmental water demand is a feasible way for improving the environment by controlling reservoirs. The current study can help guide the optimization of hydrological operation in the basin toward making the ecosystem healthier and has potential to further provide a reference for other basins in terms of hydrological alterations driven by anthropogenic activities.
APA, Harvard, Vancouver, ISO, and other styles
7

Kannan, Narayanan. "Stream Health Estimation for the Plum Creek Watershed." Hydrology 8, no. 1 (January 20, 2021): 13. http://dx.doi.org/10.3390/hydrology8010013.

Full text
Abstract:
Overall health of a stream is one of the powerful indicators for planning mitigation strategies. Currently, available methods to estimate stream health do not look at all the different components of stream health. Based on the statistical parameters obtained from daily streamflow data, water quality data, and index of biotic integrity (IBI), this study evaluated the impacts on all the elements of stream health, such as aquatic species, riparian vegetation, benthic macro-invertebrates, and channel degradation for the Plum Creek watershed in Texas, USA. The method involved the (1) collection of flow data at the watershed outlet; (2) identification of hydrologic change in the streamflow; (3) estimation of hydrologic indicators using NATional Hydrologic Assessment Tool (NATHAT) before alteration and after alteration periods; (4) identification of the most relevant indicators affecting stream health in the watershed based on stream type; (5) preliminary estimation of the existence of stream health using flow duration curves (FDCs); (6) the use of stream health-relevant hydrologic indices with the scoring system of the Dundee Hydrologic Regime Assessment Method (DHRAM). The FDCs plotted together for before and after the alteration periods indicated the likely presence of a stream health problem in the Plum Creek. The NATHAT–DHRAM method showed a likely moderate impact on the health of Plum Creek. The biological assessments carried out, the water quality data monitored, and the land cover during pre- and post-alteration periods documented in a publicly available federal document support the stream health results obtained from this study.
APA, Harvard, Vancouver, ISO, and other styles
8

Shin, Mun-Ju, Hyung-Il Eum, Chung-Soo Kim, and Il-Won Jung. "Alteration of hydrologic indicators for Korean catchments under CMIP5 climate projections." Hydrological Processes 30, no. 24 (August 2, 2016): 4517–42. http://dx.doi.org/10.1002/hyp.10948.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Leach, James M., Kurt C. Kornelsen, Jos Samuel, and Paulin Coulibaly. "Hydrometric network design using streamflow signatures and indicators of hydrologic alteration." Journal of Hydrology 529 (October 2015): 1350–59. http://dx.doi.org/10.1016/j.jhydrol.2015.08.048.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Li, Mingqian, Xiujuan Liang, Changlai Xiao, Xuezhu Zhang, Guiyang Li, Hongying Li, and Wenhan Jang. "Evaluation of Reservoir-Induced Hydrological Alterations and Ecological Flow Based on Multi-Indicators." Water 12, no. 7 (July 21, 2020): 2069. http://dx.doi.org/10.3390/w12072069.

Full text
Abstract:
Although they fulfill various needs of human beings, reservoirs also cause hydrological regime variation in the downstream regions, thus affecting ecological diversity. Therefore, studying the reservoir-induced hydrological alterations and ecological effects is of great significance, as it could guide the regulation of the reservoir to protect the river ecology. In this study, taking the Taizi River as an example, the impact of a reservoir on hydrological alteration and ecological diversity was comprehensively evaluated through eco-flow indicators based on the flow duration curve and multiple hydrological indicators. The results reveal that: (1) Ecological indicators can be used to analyze the annual and seasonal changes in the streamflow after the construction of the reservoir. The high-flow values and frequency decrease after the construction of the reservoir, especially in the autumn, while the low-flow component values increase significantly, especially in spring and summer. (2) The main influencing factors of the ecological indicators can be reflected by the relationship with precipitation, as the annual ecosurplus is not significantly affected by the reservoir, while the ecodeficit is greatly affected, and the seasonal ecological indicators (especially in spring and summer) are greatly affected by the reservoir. (3) The indicators of hydrologic alteration (IHA) show significant changes after the construction of the reservoir and are consistent with the changes in the eco-flow indicators; the change in the Shannon index indicates that the ecological diversity reduced after construction of the reservoir. It is controlled by the reservoir, and a new equilibrium state appears. (4) The eco-flow indicators have a good correlation with the 32 IHAs; they can reflect the change information of most IHAs and can avoid statistical redundancy.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Indicators of hydrologic alteration"

1

Martins, João Pedro Fernandes Farinha de Oliveira. "Avaliação ecohidrológica de caudais modificados e de caudais ecológicos em troços de rios modificados." Master's thesis, ISA/UTL, 2012. http://hdl.handle.net/10400.5/5373.

Full text
Abstract:
Mestrado em Gestão e Conservação de Recursos Naturais - Instituto Superior de Agronomia
This study aimed to improve our understanding of the ecohydrological characteristics of environmental and modified flows in Portuguese rivers considered Heavily Modified Water Bodies (HMWB), using the Indicators of Hydrologic Alteration (IAH) method. For a given set of "heavily modified river sections", this study did the characterization and analysis of present flow regimes observed, natural flow regimes, and ecological flow requirements simulated by the method of INAG, DSP (2002). Based on Indicators of Hydrologic Change, the determination of the deviations from natural regimes was performed for the present hydrological regimes: both modified and ecological. The analysis of indicators of hydrologic alteration, based on ecohydrologic assumptions that guide the definition of environmental flow regimes, allowed to develop proposals for environment mitigation, whose effectiveness should be evaluated in the context of monitoring the ecological quality of HMWB sections in order to achieve the environmental objectives set out in national and European legislation on water resources the Water Frame Directive WFD (Directive 2000/60/EC) transposed to the Portuguese legislation by the Water Law - Law n.º 58/2005, 29 December 2005
APA, Harvard, Vancouver, ISO, and other styles
2

Charnaux, Amelie Jeanne. "HYDROLOGIC ALTERATION AND SEDIMENTATION IN THE UPPER HENRY’S FORK WATERSHED." DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/565.

Full text
Abstract:
Abstract Hydrologic Alteration and Sedimentation in the Upper Henry’s Fork Watershed Amelie Jeanne Charnaux The Henry’s Fork of the Snake River is venerated by the global recreational community as one of the finest trout fishing streams on the planet. Furthermore, this remarkable waterway flows within the bounds of one of the most important ecological corridors in the equally world-renowned Greater Yellowstone Ecosystem. While the recreational and biological features of this corner of Idaho may capture the interest of the broader public, the waterway is equally significant to the livelihoods of local interests, such as the ranching and farming communities. With the stakes running high for all interest groups, a case study of the Henry’s Fork watershed provides a valuable baseline narrative for understanding decision-making related to water resources not only in Idaho, but also in other Western states. Environmental impacts of the Henry’s Lake Dam and management of the stream below the structure were evaluated by literature review and GIS mapping, with research emphasis placed on the ecological integrity and fisheries of the Upper Henry’s Fork Subbasin. The literature review focused on natural processes in stream ecosystems and anthropogenic impacts, with the goal of providing information for the development of management policies that minimize the negative impacts of current flow management and land use. Literature sources overwhelmingly agree that the alteration of natural hydrologic regimes is the most serious and continuing threat to the sustainability of river ecosystems. In recent decades, downstream recreational fishing declined on the upper Henry’s Fork due to increased sedimentation, inciting investigation as to the source. Three major anthropogenic factors targeting one section of the river, the Henry’s Lake Outlet, set the stage for excess sedimentation. First, the Henry’s Lake Dam was constructed in 1923, impacting the Outlet’s hydrology through changes in the timing, magnitude, and frequency of low and high flows. Second, an artificial stream channel was constructed in the 1920s to bypass the meandering Outlet in order to increase conveyance capacity of irrigation water from Henry’s Lake to downstream water users. Third, long-term livestock grazing along this section of river dramatically reduced riparian and upland vegetation, triggering the loss of stream-bank stability and increasing erosion and sedimentation. These management practices have resulted in significant loss of biodiversity in the stream ecosystem and an increased rate of erosion in the Outlet. The Henry’s Lake Outlet restoration project, led by the Henry’s Fork Foundation, provides the opportunity to predict potential effects of large-scale restoration in the Henry’s Fork watershed. The project seeks to reduce sediment delivery downstream from the Outlet by rerouting flow from the straightened channel into the historic channel. The project tests the hypothesis that, by restoring the meandering stream channel, and thereby adding a half-mile to the Outlet, bank erosion and channel instability will decrease, the interaction between stream and riparian habitats will improve, and overall ecosystem health will benefit. In spite of the proactive intentions of the project, it will not change the current management of stream flow. In order to restore the Henry’s Lake Outlet to a state of dynamic equilibrium in terms of erosion and sediment load, the flows from Henry’s Lake Dam must more closely reflect the natural hydrologic regime. However, the ability to implement full restoration of the Outlet is complicated by the conflict between the requirements for ecosystem health and economic and socio-political pressures, a story common to many water systems throughout the West. Ultimately, it is hoped that this research may be integrated into policy and conservation strategy to mitigate streambank erosion and sedimentation in the Henry’s Fork Subbasin.
APA, Harvard, Vancouver, ISO, and other styles
3

Fantin-Cruz, Ibraim. "Efeitos da formação e operação de um reservatório de pequena regularização na alteração da qualidade da água e do regime hidrológico na planície de inundação do Pantanal." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/62108.

Full text
Abstract:
Sabe-se que a formação de reservatórios altera a qualidade e a quantidade da água de montante e jusante e que a direção e a magnitude das alterações dependem de suas características construtivas, operacionais, morfométricas, bem como do regime hidrológico e climático da região. Porém, a maior parte deste conhecimento foi fundamentada em pesquisas de reservatórios com grande capacidade de regularização, que fazem parte da realidade do Pantanal, uma região que vem sendo impactada por um número cada vez maior de reservatórios com pequena capacidade de regularização, levantando questionamentos sobre seus possíveis efeitos no funcionamento da planície de inundação. Sendo assim, este trabalho procurou (i) identificar qual o fator chave determinante no processo de estratificação e mistura vertical do reservatório e se este pode influenciar na qualidade da água; (ii) avaliar os efeitos da formação e operação do reservatório na alteração da qualidade da água de montante e jusante e (iii) avaliar os efeitos da operação do reservatório na alteração do regime hidrológico de jusante, além de propor os limites preventivos para a sustentabilidade. O estudo foi desenvolvido no reservatório de Ponte de Pedra, localizado no rio Correntes, divisa dos estados de Mato Grasso e Mato Grosso do Sul (Centro Oeste do Brail), na fronteira entre o Pantanal e o Planalto. O reservatório apresentou prolongado período de estratificação vertical (mistura no inverno) dos parâmetros físicos e químicos da água nas partes médias e profundas, mantendo-se homogêneo na parte superior, onde se encontra a captação, não alterando as características da água de jusante. Entre os fatores analisados, o vento foi o único fator que influenciou significativamente a estrutura vertical da qualidade da água sendo beneficiada pelas características morfométricas e construtivas do reservatório. Longitudinalmente, a formação do reservatório alterou significativamente quatro dos dez parâmetros analisados, com redução média de 38% da turbidez, 28% do fósforo total, 23% dos sólidos totais e 14% do nitrato. Destes, apenas a turbidez e o nitrato foram afetados pelo controle operacional do tempo de retenção hidráulica. Em relação à alteração dos parâmetros do regime hidrológico anual, dos 31 analisados, os parâmetros de vazões mínimas de curta duração (1, 3 e 7 dias), vazões máximas de 90 dias e o número de pulsos baixos e altos foram significativamente alterados pela operação do reservatório. Destes, a vazão máxima de 90 dias e o número de pulsos altos resumem os impactos, e podem ser utilizados como parâmetros alvos para restauração e conservação do regime hidrológico. As vazões sazonais também foram significativamente alteradas, com maior impacto na estação seca (inverno). Com base na variabilidade natural do rio, foram propostos os limites preventivos para a sustentabilidade, com alterações diárias permitidas de ±18% no inverno, ±24% na primavera e ±22% no verão e outono, aplicados sobre a vazão natural. De maneira geral, as alterações na qualidade da água e no regime hidrológico provocado pela formação e operação do reservatório foram consideradas baixas, tanto em número de parâmetros alterados quanto nas magnitudes das alterações, e estas foram atribuídas às baixas concentrações de partículas e nutrientes na bacia, ao sistema de captação superficial, o curto tempo de retenção hidráulica, pequena capacidade de regularização associadas à sazonalidade no regime de chuvas e ventos na região, que limitam manobras operacionais para a maximização da eficiência energética.
The formation of reservoirs changes the quality and quantity of water, both upstream and downstream, and the direction and magnitude of such changes depend on their characteristics of construction, operation, morphometry, as well as hydrological regime and climate of the region. However, much of this knowledge was based on large reservoirs, which is not the reality of the Pantanal, an area that is being impacted by a growing number of reservoirs with low capacity for regularization, raising questions about possible effects on the floodplain functioning. In this way, this study aimed (i) to identify the key factor in the process of stratification and vertical mixing of the reservoir, and whether this can influence the water quality, (ii) to evaluate the effects of the reservoir formation and operation on the quality of water upstream and downstream of the reservoir, and (iii) to examine the effects of the reservoir operation on the downstream hydrological regime, in addition to propose preventive limits for sustainability. The study was conducted at Ponte de Pedra Reservoir, located on the Correntes river, the motto between the states of Mato Grasso and Mato Grosso do Sul (Central West Brazil), on the border between the Plateau and the Pantanal. The reservoir had an extended period of vertical stratification (mixture in the winter) of physical and chemical water parameters in the medium and deep parts of the water column, being homogeneous in the upper part where the water is capitation, without changing the characteristics of the downstream water. Among the factors analyzed, the wind was the only factor that significantly influenced the vertical structure of the water quality, favored by morphometric and constructive characteristics of the reservoir. Along the longitudinal axis, the reservoir formation significantly altered the turbidity and concentrations of total phosphorus, total solids, and nitrate, with mean reduction of 38, 28, 23 and 14% of their values. Among these, only turbidity and nitrate were affected by the operational control of the hydraulic retention time. In relation to the change in parameters of the annual hydrological regime, parameters of short-term minimum flows (1, 3 and 7 days), maximum flows of 90 days and the number of low and high pulses were significantly modified by the reservoir operation. Of these, the maximum flow of 90 days and the number of high pulses have summarized the impacts, and can be used as target parameters for restoration and conservation of the hydrological regime. Seasonal flows were also significantly altered, with the greatest impact in the dry season (winter). Based on the natural variability of the river, it was proposed preventive limits for sustainability, with permitted daily changes of ±18% in winter, ±24% in spring and ±22% in summer and autumn applied on the natural flow. In general, changes in water quality and hydrological regime caused by the reservoir formation and operation were considered low, both in number of altered parameters as magnitudes of such changes, and these characteristics were ascribed to low concentrations of particles and nutrients in the basin, to the surface capitation system, short hydraulic retention time, low capacity of regularization associated with the seasonality of the regime of rainfall and wind in the region, limiting operational maneuvers for maximizing the energy efficiency.
APA, Harvard, Vancouver, ISO, and other styles
4

Dickie, Jennifer M. "Mineralogical and Geochemical Indicators of Subaerial Weathering in the Pozzolane Rosse Ignimbrite (Alban Hills Volcanic District, Italy)." Digital Archive @ GSU, 2010. http://digitalarchive.gsu.edu/geosciences_theses/23.

Full text
Abstract:
The Pozzolane Rosse ignimbrite [PR] (457±4 ka) in the Alban Hills Volcanic District, Rome, Italy was exposed ~ 40 ka prior to a subsequent volcanic event which coverd it entirely. XRF, XRD, and clay separation results from PR samples from INGV and CA1 boreholes and Castel di Leva quarry show evidence of paleopedogenesis. All locations display loss of base cations, loss of K is consistent with XRD datat showing dissolution or alteration of leucite to analcime. Accumulation of Al and high L.O.I. support XRD evidence of 1:1 clay species at upper depth. Data suggest alteration extent can be determined by geochemistry. Hydrothermal alteration is assessed from geochemistry showing significant leaching of major and trace elements, primary mineralogy loss and iron sulfide and sulfate mineral development. Deep samples of PR may show groundwater influenced alteration with the presence of expandable 2:1 clays, zeolites, and possible mixing with the underlying Vallerano Lava.
APA, Harvard, Vancouver, ISO, and other styles
5

Mercer, Celestine Nicole. "Mineralogical indicators of magmatic and hydrothermal processes in continental arc crust /." Connect to title online (Scholars' Bank) Connect to title online (ProQuest), 2009. http://hdl.handle.net/1794/10250.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Calapa, Kayla. "Hydrologic alteration and enhanced microbial reductive dissolution of Fe(III) (hydr)oxides under flow conditions in Fe(III)-rich rocks: contribution to cave-forming processes." University of Akron / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=akron1619628782604003.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Haro, Monteagudo David. "Methodology for the optimal management design of water resources system under hydrologic uncertainty." Doctoral thesis, Universitat Politècnica de València, 2015. http://hdl.handle.net/10251/45996.

Full text
Abstract:
Un sistema de gestión de sequías apropiado requiere de la anticipación de los posibles efectos que un episodio de este tipo tenga sobre el sistema de recursos hídricos. Esta tarea sin embargo resulta más complicada de lo que parece. En primer lugar, debido al alto grado de incertidumbre existente en la predicción de variables hidrológicas futuras. Y en segundo, debido al riesgo de sobrerreacción en la activación de medidas de mitigación generando falsa sensación de escasez, o sequía artificial. A este respecto, los planes especiales de sequía proveen de herramientas para la gestión eficiente de situaciones con escasez de recursos y la preparación de cara a futuros eventos. De todos modos, las diferentes estrategias de operación seguidas en cada sistema de recursos hídricos hacen que las herramientas que en algunos casos resultaron altamente útiles no lo sean tanto cuando se aplican en sistemas distintos. Debido a la falta de tiempo y/o al exceso de confianza en los trabajos realizados por terceros, con excelentes resultados en sus respectivos casos, a veces se cae en el error de implementar metodologías no del todo apropiadas en sistemas con requisitos completamente distintos. El desarrollo y utilización de metodologías generalizadas aplicables a diferentes sistemas y capaces de proporcionar resultados adaptados a cada caso es, por tanto, muy deseable. Este es el caso de las herramientas de modelación de sistemas de recursos hídricos generalizadas. Estas permiten homogeneizar los procesos mientras siguen siendo los suficientemente adaptables para proporcionar resultados apropiados para cada caso de estudio. Esta tesis presenta una serie de herramientas destinadas a avanzar en el análisis y comprensión de los sistemas de recursos hídricos, haciendo énfasis en la prevención de sequías y la gestión de riesgos. Las herramientas desarrolladas incluyen: un modelo de optimización generalizado para esquemas de recursos hídricos, con capacidad para la representación detallada de cualquier sistema de recursos hídricos, y una metodología de análisis de riesgo basada en la optimización de Monte Carlo con múltiples series sintéticas. Con estas herramientas es posible incluir tanto la componente superficial como la subterránea del sistema estudiado dentro del proceso de optimización. La optimización está basada en la resolución iterativa de redes de flujo. Se probó la consistencia y eficiencia de diferentes algoritmos de resolución para encontrar un balance entre la velocidad de cálculo, el número de iteraciones, y la consistencia de los resultados, aportando recomendaciones para el uso de cada algoritmo dadas las diferencias entre los mismos. Las herramientas desarrolladas se aplican en dos casos de estudio reales en la evaluación y posibilidad de complementación de los sistemas de monitorización y alerta temprana de sequías existentes en los mismos. En el primer caso, se propone un enfoque alternativo para la monitorización de la sequía en el sistema de operación anual del río Órbigo (España), complementándolo con la utilización de la metodología de análisis de riesgo. En el segundo caso, las herramientas se emplean en un sistema con una estrategia de operación completamente distinta. Se estudia como el análisis de riesgo de la gestión óptima puede ayudar a la activación anticipada de los escenarios de sequía en los sistemas de los ríos Júcar y Turia, cuya operación es hiperanual. En esta ocasión, el sistema de indicadores existente goza de una gran confianza por parte de los usuarios. La metodología de análisis de riesgo es, sin embargo, capaz de anticipar los eventos de sequía con mayor alarma, aspecto que es deseable si se quiere evitar que los episodios en desarrollo vayan a más. En ambos casos se muestra como la evaluación anticipada de las posibles situaciones futuras del sistema permiten una definición confiable de los escenarios de sequía con suficiente antelación para la activación efectiva de medidas de prevención y/o mitigación en caso de ser necesarias. La utilización de indicadores provenientes de modelos frente a indicadores basados en datos observados es complementaria y ambos deberían utilizarse de forma conjunta para mejorar la gestión preventiva de los sistemas de recursos hídricos. El empleo de modelos de optimización en situaciones de incertidumbre hidrológica es muy apropiado gracias a la no necesidad de definir reglas de gestión para obtener los mejores resultados del sistema, y teniendo en cuenta que las reglas de operación habituales pueden no ser completamente adecuadas en estas ocasiones.
Haro Monteagudo, D. (2014). Methodology for the optimal management design of water resources system under hydrologic uncertainty [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/45996
TESIS
APA, Harvard, Vancouver, ISO, and other styles
8

Andersson, Nyberg Adrian. "Combining hydrologic modelling and boundary shear stress estimates to evaluate the fate of fine sediments in river Juktån : Impact of ecological flows." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-145948.

Full text
Abstract:
Altered flow regimes following river regulation can result in significant changes in river bed geomorphology and subsequent negative ecological impacts caused by re-suspended sediments deposited on the riverbed. This study aimed to evaluate the consequences of implementing an ecological flow regime on sediments accumulated within the regulated river Juktån. Sediments were sampled and analysed for particle size distribution to estimate sediment stability. Flow alteration following the ecological flow regime was analysed with HEC-RAS unsteady flow simulation serving as a basis for calculations of forces acting to erode or retain deposited sediments. Additional analyses regarding critical flow were made with HEC-RAS steady flow simulation. Results show that 4 out of 15 cross-sections analysed would have the potential to erode and re-suspend sediments. The estimated average critical flow for when sediments become unstable with potential to re-suspend is 17 m3/s. The total sediment inventory of the studied reach is ~25000 ton, with ~3000-ton sediments potentially eroding into re-suspension. This is approximately 3% of river Umeälvens annual 100 000 ton suspended sediments before being regulated. Results indicate that river bed heterogeneity in river Juktån could benefit from implementing the ecological flow regime while not mobilizing such amounts of fine sediments that would cause clogging effects downstream the site of interest. The study also introduces the erosion rate equation which compares the annual erosion between two different flow regimes.
APA, Harvard, Vancouver, ISO, and other styles
9

Cauvin-Hardy, Clémence. "Optimisation de la gestion du patrimoine culturel et historique à l’aide des méthodologies avancées d’inspection." Thesis, Université Clermont Auvergne‎ (2017-2020), 2020. http://www.theses.fr/2020CLFAC057.

Full text
Abstract:
La thèse porte sur l’optimisation de la gestion du patrimoine culturel et historique à l'aide des méthodologies avancées d'inspection tout en s’appuyant sur le projet HeritageCare.La réponse à cette problématique est posée en cinq chapitres : (1) un état de l’art des méthodologies de gestion préventive, du projet HeritageCare et de l’identification de l’état de dégradation, (2) la mise en place de la méthodologie générale de la gestion préventive décomposée en quatre étapes (l’anamnèse, le diagnostic, la thérapie et le contrôle), (3) la proposition de modèles d’agrégation (4), les résultats de l’application de la démarche de gestion préventive et enfin (5) ceux de l’application des modèles. Ces derniers permettent de hiérarchiser les bâtis sur la base de 37 critères organisés en sous critères et indicateurs, de mettre en évidence la prise de décision des propriétaires sur la base de matrice de criticité combinant les valeurs des indicateurs, de déterminer la durée de vie résiduelle des bâtis sur la base de courbes d’altérations, de proposer et de hiérarchiser des actions de maintenance en s’appuyant sur une base de données développée. La méthodologie est illustrée par son application à quatorze bâtis représentant le patrimoine culturel et historique français
The objective of the thesis is to optimize the management of cultural and historical building heritage using advanced inspection methodologies with HeritageCare project.The answer to this problem is detailed in five chapters: (1) a state of the art of preventive management methodologies, the HeritageCare project and the identification of the state of degradation, (2) the implementation of the general methodology on preventive management is decomposed into 4 steps (anamnesis, diagnosis, therapy and control), (3) proposal of aggregation models (4), results of the application of the management approach preventive and finally (5) the application of models. These make it possible to prioritize the buildings on the basis of 37 criteria organized into sub-criteria and indicators, highlight the decision-making of the owners on the basis of a criticality matrix combining the values ​​of the indicators, determine the useful life of the buildings with the deterioration curves, propose and prioritize maintenance actions based on a developed database.The methodology is illustrated by its application on fourteen buildings representing the French cultural and historical heritage
APA, Harvard, Vancouver, ISO, and other styles
10

Thum, Bing-Hao, and 覃炳晧. "The Use of Indicator of Hydrologic Alteration in the Assessment of the Reproducibility of Synthetic Flow Models." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/99924017783687098102.

Full text
Abstract:
碩士
國立臺灣大學
土木工程學研究所
101
The use of synthetic streamflow is particularly useful for water resources engineering. In the past decades, successful application of synthetic hydrologic sequences has been recognized for traditional engineering purposes, such as reservoir operation, water supply and flood control. With the increasing attention for the ecosystem, hydraulic engineering has to appropriately consider the ecological needs. However, the use of synthetic streamflow for ecological purpose has never been carefully examined. Hence a question is raised, could traditional synthetic streamflow approach provide reasonable result for determining ecological conditions? For this reason, this study addresses the reproduction of ecological patterns by synthetic streamflow generation model. The Tanshui River in Taiwan is used as a case study. We consider several combinations of different synthetic flow methods to examine this issue. Following approaches are considered, (1) Pure synthetic simulation model (2) Long term simulation and daily disaggregation models. The long term simulation models used in this study are SAMS-2007 and Modified k-NN bootstrap non-parametric approach. These models are applied to generate annual or monthly flow data according to historical record. Then Shot noise and k-NN based disaggregation models are applied to generate the daily flow. According to daily flow data generated, the Indicators of Hydrologic Alterations (IHA) program is used to quantify ecological patterns. By comparing the difference of 32 IHA indicators between historical and generated flow data, we evaluate the reproduction of different daily flow generation models in ecological characteristics. For the perspective of ecological needs, this study discusses the advantage and disadvantage of synthetic streamflow generation models and makes suggestion for their application for facilities design process.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Indicators of hydrologic alteration"

1

Massachusetts. Dept. of Conservation and Recreation and Geological Survey (U.S.), eds. Indicators of streamflow alteration, habitat fragmentation, impervious cover, and water quality for Massachusetts stream basins. Reston, Va: U.S. Dept. of the Interior, U.S. Geological Survey, 2010.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Vargas, Cristina Recasens. Diatoms as indicators of hydrologic and climatic changes in Laguna Potrok Aike, Patagonia (PASADO). Genève: Département de Géologie et Paléontologie, Université de Genève, 2013.

Find full text
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Indicators of hydrologic alteration"

1

Lin, Kairong, Fan Zhang, Qiang Zhang, Xinjun Tu, and Yang Hu. "Fuzzy-Based Comprehensive Evaluation of Environmental Flow Alteration." In Hydrologic Modeling, 621–38. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-5801-1_43.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Arthington, Angela H. "Environmental Flows: Ecological Limits of Hydrologic Alteration (ELOHA)." In The Wetland Book, 1–5. Dordrecht: Springer Netherlands, 2016. http://dx.doi.org/10.1007/978-94-007-6172-8_348-1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Arthington, Angela H. "Environmental Flows: Ecological Limits of Hydrologic Alteration (ELOHA)." In The Wetland Book, 1843–47. Dordrecht: Springer Netherlands, 2018. http://dx.doi.org/10.1007/978-90-481-9659-3_348.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Camargo, Julio A. "The alteration in informative weights of biological species as an ecological indicator of environmental impacts." In Ecological Indicators, 1524–26. Boston, MA: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4615-4661-0_56.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Vostokova, E. A. "The Present State of Hydrologic Indicator Research." In Plant Indicators of Soils, Rocks, and Subsurface Waters, 5–10. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4899-4914-1_2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Mandych, A. F. "Spatial Variability of the Hydrologic Cycle and Some Indicators of its State." In Environmental Reconstruction in Headwater Areas, 81–91. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4134-5_7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Popova, T. A. "Hydrologic Indicator Properties of the Vegetation in Zones of Inadequate Moisture and their Representation in Aerial Photographs." In Plant Indicators of Soils, Rocks, and Subsurface Waters, 207–10. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4899-4914-1_41.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Levin, V. I. "Experience in Hydrologic Indicator Zonation of the North Caspian Region in the Search for Fresh and Brackish Waters." In Plant Indicators of Soils, Rocks, and Subsurface Waters, 11–15. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4899-4914-1_3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Chalidze, F. N. "Ecological Characteristics and the Root System Structure of Some Hydrologic Indicator Species in the Alluvial-Delta Valley of the Syr-Dar’ya." In Plant Indicators of Soils, Rocks, and Subsurface Waters, 44–47. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4899-4914-1_10.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Arthington, Angela H. "Setting Limits to Hydrologic Alteration." In Environmental Flows, 273–86. University of California Press, 2012. http://dx.doi.org/10.1525/california/9780520273696.003.0019.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Indicators of hydrologic alteration"

1

Yu, Chunxue, Xin'An Yin, Zhifeng Yang, and Zhi Dang. "Assessment of the degree of hydrological indicators alteration under climate change." In 2017 6th International Conference on Energy and Environmental Protection (ICEEP 2017). Paris, France: Atlantis Press, 2017. http://dx.doi.org/10.2991/iceep-17.2017.36.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

ŽIBIENĖ, Gražina, Alvydas ŽIBAS, and Goda BLAŽAITYTĖ. "ASSESSMENT OF HYDROLOGICAL CHANGES IN THE ŠUŠVĖ RIVER." In Rural Development 2015. Aleksandras Stulginskis University, 2015. http://dx.doi.org/10.15544/rd.2015.035.

Full text
Abstract:
The construction of dams in rivers negatively affects ecosystems because dams violate the continuity of rivers, transform the biological and physical structure of the river channels, and the most importantly – alter the hydrological regime. The impact on the hydrology of the river can occur through reducing or increasing flows, altering seasonality of flows, changing the frequency, duration and timing of flow events, etc. In order to determine the extent of the mentioned changes, The Indicators of Hydrologic Alteration (IHA) software was used in this paper. The results showed that after the construction of Angiriai dam, such changes occurred in IHA Parameters group as: the water conditions of April month decreased by 31 %; 1-day, 3-days, 7-days and 30-days maximum flow decreased; the date of minimum flow occurred 21 days later; duration of high and low pulses and the frequency of low pulses decreased, but the frequency of high pulses increased, etc. The analysis of the Environmental Flow Components showed, that the essential differences were recorded in groups of the small and large floods, when, after the establishment of the Šušvė Reservoir, the large floods no longer took place and the probability of frequency of the small floods didn’t exceed 1 time per year.
APA, Harvard, Vancouver, ISO, and other styles
3

Brandt, Sara, Richard M. Vogel, and Stacey Archfield. "Indicators of Hydrologic Stress in Massachusetts." In World Environmental and Water Resources Congress 2008. Reston, VA: American Society of Civil Engineers, 2008. http://dx.doi.org/10.1061/40976(316)536.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Guo, Lidan, Ziqiang Xia, Lanlan Yu, and Qichuan Chen. "Assessment of Instream Hydrologic Regime Alteration Induced by Hydraulics." In 2011 Asia-Pacific Power and Energy Engineering Conference (APPEEC). IEEE, 2011. http://dx.doi.org/10.1109/appeec.2011.5748345.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Sephton, Mark A., Randall S. Perry, and Richard B. Hoover. "Thiophenes as indicators of aqueous alteration in carbonaceous meteorites." In SPIE Optics + Photonics, edited by Richard B. Hoover, Gilbert V. Levin, and Alexei Y. Rozanov. SPIE, 2006. http://dx.doi.org/10.1117/12.698393.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Egderly, J. L., L. A. Roesner, C. A. Rohrer, and J. A. Gironás. "Quantifying Urban-induced Flow Regime Alteration and Evaluating Mitigation Alternatives Using Mathematical Models and Hydrologic Metrics." In World Environmental and Water Resources Congress 2006. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40856(200)425.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

SOLER, LAURA RAMOS, JAVIER PAREDES ARQUIOLA, JOAQUÍN ANDREU ÁLVAREZ, and ANTONI MUNNÉ TORRAS. "ASSESSMENT OF CLIMATE CHANGE IMPACTS ON THE HYDROLOGIC RISK BY QUANTITATIVE ALTERATION IN THE CATALAN INTERNAL BASINS." In RIVER BASIN MANAGEMENT 2019. Southampton UK: WIT Press, 2019. http://dx.doi.org/10.2495/rbm190111.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Li, Yang, Jia-Peng Wu, Lai-Sheng Liu, Lei-Xiang Wu, and Wei-Jie Huo. "The Assessment of River Habitat on Water Temperature and Hydrologic Alteration of De-Watered River Channel in Flood Season." In 2018 International Conference on Engineering Simulation and Intelligent Control (ESAIC). IEEE, 2018. http://dx.doi.org/10.1109/esaic.2018.00031.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Aljabri, Wijdan Said, D. P. Hullaster, J. E. Sabisch, P. R. Larson, Gerilyn (Lynn) S. Soreghan, and A. S. Elwood Madden. "NANOSCALE CHEMISTRY AND MINERALOGY OF AUTHIGENIC CLAYS IN THE PERMIAN CUTLER FORMATION AS INDICATORS OF FLUID ALTERATION AND PALEOCLIMATE." In Joint 55th Annual North-Central / 55th Annual South-Central Section Meeting - 2021. Geological Society of America, 2021. http://dx.doi.org/10.1130/abs/2021nc-362826.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Contero, Manuel, Ferran Naya, David Pérez-López, Pedro Company, and Jorge D. Camba. "A Study on Sampling Strategies to Determine the Variability of Parametric History-Based 3D CAD Models." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-87404.

Full text
Abstract:
Design reusability largely depends on the parametric quality of its associated digital product data. In this regard, the quality of the master model (typically a history-based parametric model) is crucial. However, no quantitative metrics exist that can provide an accurate assessment of parametric complexity and model reusability. In this paper, a set of 370 parametric 3D CAD models of various geometric complexities were analyzed to assess their robustness when undergoing alteration. Three indicators for estimating the modification ability of the model are proposed: Ratio for Exhaustive Modification, Ratio for Selective Exhaustive Modification, and Ratio for Weighted Exhaustive Modification. Correlations between these indicators as well as other geometric complexity metrics are studied. The geometric complexity metrics considered in our study include number of faces, surface area to volume ratio, sphericity, and convexity. Our experimental results with the proposed indicators provide new insights on the quantitative assessment of parametric complexity and support their use as reliable indicators of CAD model reusability.
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Indicators of hydrologic alteration"

1

McCracken, A. D., D. K. Armstrong, and D. C. McGregor. Fossils as indicators of thermal alteration associated with kimberlites. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1996. http://dx.doi.org/10.4095/211724.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Hamill, Daniel, and Gabrielle David. Hydrologic analysis of field delineated ordinary high water marks for rivers and streams. Engineer Research and Development Center (U.S.), August 2021. http://dx.doi.org/10.21079/11681/41681.

Full text
Abstract:
Streamflow influences the distribution and organization of high water marks along rivers and streams in a landscape. The federal definition of ordinary high water mark (OHWM) is defined by physical and vegetative field indicators that are used to identify inundation extents of ordinary high water levels without any reference to the relationship between streamflow and regulatory definition. Streamflow is the amount, or volume, of water that moves through a stream per unit time. This study explores regional characteristics and relationships between field-delineated OHWMs and frequency-magnitude streamflow metrics derived from a flood frequency analysis. The elevation of OHWM is related to representative constant-level discharge return periods with national average return periods of 6.9 years using partial duration series and 2.8 years using annual maximum flood frequency approaches. The range in OHWM return periods is 0.5 to 9.08, and 1.05 to 11.01 years for peaks-over-threshold and annual maximum flood frequency methods, respectively. The range of OHWM return periods is consistent with the range found in national studies of return periods related to bankfull streamflow. Hydraulic models produced a statistically significant relationship between OHWM and bank-full, which reinforces the close relationship between the scientific concept and OHWM in most stream systems.
APA, Harvard, Vancouver, ISO, and other styles
3

de Caritat, Patrice, Brent McInnes, and Stephen Rowins. Towards a heavy mineral map of the Australian continent: a feasibility study. Geoscience Australia, 2020. http://dx.doi.org/10.11636/record.2020.031.

Full text
Abstract:
Heavy minerals (HMs) are minerals with a specific gravity greater than 2.9 g/cm3. They are commonly highly resistant to physical and chemical weathering, and therefore persist in sediments as lasting indicators of the (former) presence of the rocks they formed in. The presence/absence of certain HMs, their associations with other HMs, their concentration levels, and the geochemical patterns they form in maps or 3D models can be indicative of geological processes that contributed to their formation. Furthermore trace element and isotopic analyses of HMs have been used to vector to mineralisation or constrain timing of geological processes. The positive role of HMs in mineral exploration is well established in other countries, but comparatively little understood in Australia. Here we present the results of a pilot project that was designed to establish, test and assess a workflow to produce a HM map (or atlas of maps) and dataset for Australia. This would represent a critical step in the ability to detect anomalous HM patterns as it would establish the background HM characteristics (i.e., unrelated to mineralisation). Further the extremely rich dataset produced would be a valuable input into any future machine learning/big data-based prospectivity analysis. The pilot project consisted in selecting ten sites from the National Geochemical Survey of Australia (NGSA) and separating and analysing the HM contents from the 75-430 µm grain-size fraction of the top (0-10 cm depth) sediment samples. A workflow was established and tested based on the density separation of the HM-rich phase by combining a shake table and the use of dense liquids. The automated mineralogy quantification was performed on a TESCAN® Integrated Mineral Analyser (TIMA) that identified and mapped thousands of grains in a matter of minutes for each sample. The results indicated that: (1) the NGSA samples are appropriate for HM analysis; (2) over 40 HMs were effectively identified and quantified using TIMA automated quantitative mineralogy; (3) the resultant HMs’ mineralogy is consistent with the samples’ bulk geochemistry and regional geological setting; and (4) the HM makeup of the NGSA samples varied across the country, as shown by the mineral mounts and preliminary maps. Based on these observations, HM mapping of the continent using NGSA samples will likely result in coherent and interpretable geological patterns relating to bedrock lithology, metamorphic grade, degree of alteration and mineralisation. It could assist in geological investigations especially where outcrop is minimal, challenging to correctly attribute due to extensive weathering, or simply difficult to access. It is believed that a continental-scale HM atlas for Australia could assist in derisking mineral exploration and lead to investment, e.g., via tenement uptake, exploration, discovery and ultimately exploitation. As some HMs are hosts for technology critical elements such as rare earth elements, their systematic and internally consistent quantification and mapping could lead to resource discovery essential for a more sustainable, lower-carbon economy.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Indicators of hydrologic alteration' for particular source types:
Journal articles Dissertations / Theses
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography