Relevant bibliographies by topics / Lower Chambo River Basin

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Academic literature on the topic 'Lower Chambo River Basin'

Author: Grafiati
Published: 4 June 2021
Last updated: 17 February 2022

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Journal articles on the topic "Lower Chambo River Basin"

1

Mendoza, Benito, Manuel Fiallos, Sandra Iturralde, et al. "Determination of field capacity in the Chibunga and Guano rivers micro-basins." F1000Research 10 (March 3, 2021): 172. http://dx.doi.org/10.12688/f1000research.28143.1.

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Background: The micro-basins of the Chibunga and Guano rivers are located within the sub-basin of the Chambo River, which starts at the thaw of the Chimborazo, crosses the cities of Guano and Riobamba, and ends in the Chambo River. These rivers are considered fluvial hydrological forces and geological limits of the aquifer, located in this sub-basin. For this reason, our investigation addressed the field capacity in the micro-basins of Chibunga and Guano rivers, to determine the maximum retention potential, i.e., the saturation of water in the soil. Methods: We investigated the change of precipitation to runoff through the correlations between the characteristics of the soil and its vegetation. We applied the Curve Number (CN) method introduced by the United States Soil Conservation Service (USSCS); this represents an empirical model, which relates the vegetation cover to the geological and topographic conditions of the soil. Along with the geographic information system, the model allows to represent the variation of runoffs for each micro-basin, according to the different land use categories, over the time frame from 2010 to 2014. Results: We found that the maximum retention potential is directly affected by CN values, representing the runoff potential. Highest values of 100 belong to the wetlands, urban area, snow, and water, as rain is converted directly into runoff, being impervious areas. The Guano river micro-basin possesses clay soil with CN of 78, the soil texture for eucalyptus forest is clay loam, and its CN value, 46, is the lowest of the data set. Knowledge of field capacity allows to properly evaluate the storage capacity of soil and water conservation. Conclusions: Results of this work will be useful in the quantification of the water balance, to determine the water supply and demand.
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2

Taylor, P., and G. Wright. "Establishing river basin organisations in Vietnam: Red River, Dong Nai River and Lower Mekong Delta." Water Science and Technology 43, no. 9 (2001): 273–81. http://dx.doi.org/10.2166/wst.2001.0557.

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River basin management is receiving considerable attention at present. Part of the debate, now occurring worldwide, concerns the nature of the organisations that are required to manage river basins successfully, and whether special-purpose river basin organisations (RBOs) are always necessary and in what circumstance they are likely to (i) add to the management of the water resources and (ii) be successful. The development of river basin management requires a number of important elements to be developed to a point where the river basin can be managed successfully. These include the relevant laws, the public and non-government institutions, the technical capabilities of the people, the understanding and motivation of people, and the technical capacity and systems, including information. A river basin organisation (or RBO) is taken to mean a special-purpose organisation charged with some part of the management of the water resources of a particular river basin. Generally speaking, such organisations are responsible for various functions related to the supply, distribution, protection and allocation of water, and their boundaries follow the watershed of the river in question. However, the same functions can be carried out by various organisations, which are not configured on the geographical boundaries of a river basin. This paper outlines recent work on river basin organisation in Vietnam, and makes some comparisons with the situation in Australia.
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3

Kudo, Shun, Atsuhiro Yorozuya, Hiroshi Koseki, Yoichi Iwami, and Makoto Nakatsugawa. "Inundation Process in the Lower Mekong River Basin." Journal of Disaster Research 11, no. 6 (2016): 1062–72. http://dx.doi.org/10.20965/jdr.2016.p1062.

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This study simulated the inundation process in the Lower Mekong River Basin (LMB). The LMB has suffered from severe floods, especially in 2000 and 2011. To quantify the inundation of water in a basin where large-scale inundation by river water occurs, understanding the conveyance of a river channel during a flood is particularly important. Therefore, we conducted a field survey using an acoustic Doppler current profiler (aDcp) to understand the longitudinal distribution of the width and depth of the river channel and the variation in hydraulic resistance with respect to shear stress on the riverbed. It was found that the width and depth vary longitudinally, and the relationship between them can be estimated by an equation derived from governing equations of water and sediment and the bed load formula. Furthermore, it was revealed that hydraulic resistance decreases with increasing non-dimensional shear stress. Then, the characteristics of the river channel were incorporated into the runoff-inundation simulation. Furthermore, inundation water should be validated not only in terms of inundation extent but also with respect to water depth and velocity. These were estimated using 8-day composite surface reflectance data from the Moderate Resolution Imaging Spectrometer (MODIS) and the SRTM. Simulation results indicated that water level and discharge within the river channel were able to reproduce observed values. Additionally, simulated inundation extent, water velocity, and water depth over the floodplain showed reasonable agreement with the results using the data from the MODIS and the SRTM. Although there are some elements that should be improved, the inundation process in the LMB was simulated appropriately despite its complexity. The method described in this study to set a calculation condition and to validate variables over a floodplain should be useful for runoff-inundation simulation in various large-scale basins.
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4

ÖZŞAHİN, Emre, and Ahmet ATASOY. "The Soils of The Lower Asi River Basin." Gaziantep University Journal of Social Sciences 14, no. 24224 (2015): 127–53. http://dx.doi.org/10.21547/jss.256776.

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5

Vasenko, O. G. "Environmental Situation in the Lower Dnipro River Basin." Water Quality Research Journal 33, no. 4 (1998): 457–88. http://dx.doi.org/10.2166/wqrj.1998.027.

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Abstract The paper summarizes Ukrainian findings and conclusions of the first Ukrainian-Canadian field study on the state of the environment in the Lower Dnipro River Basin. Three major issues were identified during the field study: accelerated eutrophication from municipal and agro-industrial discharges, industrial pollution, and radionucleide contamination of reservoir sediments. The Dnipropetrovsk-Zaporizhzhia-Kryviy Rih triangle has been recognized as an area which has been greatly affected by pollutants originating from many activities, including heavy industry, oil refining, metallurgy, petrochemistry, mining and power generation. The results of biological assays demonstrated that the Lower Dnipro River is endangered by toxic pollution originating from poorly treated or untreated effluent discharges. Of 58 industrial wastewater samples, taken at 31 outlets of the Dnripo and its tributaries, 69% contained various levels of toxic substances. Various degrees of toxicity were detected in 97% of 53 of the wastewater samples, taken at 37 sites. As a result, the majority of the tributaries sampled were of poor water quality and exceeded the statutory pollution standards. The diversity of phyto- and zooplankton was found to be severely reduced as was the native fish population in the Dnipro reservoirs. The maximum Cs-137 concentrations in bottom sediments of the Dnipro reservoirs varied from 31 to 520 Bq/kg, with the highest levels occurring in the reservoir closest to Chernobyl. The Ukranian government has identified the Lower Dnipro Basin as a top priority area for a strategic remedial action plan.
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6

Tarbeeva, Anna, Lyudmila Lebedeva, Vladimir Efremov, Vladimir Shamov, and Olga Makarieva. "Water tracks in the lower Lena River basin." E3S Web of Conferences 163 (2020): 04007. http://dx.doi.org/10.1051/e3sconf/202016304007.

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In the permafrost regions, where water filtration zone is limited by the shallow active layer, the surface flow forms a network of hollows, called «water tracks», oriented along the slope gradient. Water tracks are clearly distinguished on satellite images, but poorly defined in the field. The pattern of the water tracks network depends on geomorphological position, permafrost and geological conditions and dominant cryogenic processes. Surface flow could occur in the water tracks during the snowmelt and heavy rains, when the soil is entirely frozen or fully saturated by water. In dry periods, the water tracks form retention zones due to low filtration rates and significant capacity of thawed soil beneath the troughs. Our study of water tracks in the north-western Yakutia showed the changes of their morphology from upstream towards downstream. The water levels in the water tracks have a pronounced diurnal course in reverse phase to the water temperature variation. They are related to diurnal ground thawing dynamics. Hydrology of water tracks depends on the peat thickness, active layer properties and lithology. Water tracks formed by rubble rocks respond to a storm event with rapidly increasing water level. The deeper thawing layer, the smoother water levels rise and decrease.
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7

Stamer, John K., and Ronald B. Zelt. "Organonitrogen herbicides in the lower Kansas River basin." Journal - American Water Works Association 86, no. 1 (1994): 93–104. http://dx.doi.org/10.1002/j.1551-8833.1994.tb06139.x.

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8

Jacobs, Jeffrey W. "Toward Sustainability in Lower Mekong River Basin Development." Water International 19, no. 1 (1994): 43–51. http://dx.doi.org/10.1080/02508069408686196.

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9

Ribeiro, C. R. S., D. A. Z. Garcia, A. D. A. Costa, et al. "Length-weight relationships of fish species from Lower Paranapanema River Basin, Upper Paraná River Basin, Brazil." Journal of Applied Ichthyology 33, no. 5 (2017): 1038–39. http://dx.doi.org/10.1111/jai.13415.

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10

Wise, Erika K., Connie A. Woodhouse, Gregory J. McCabe, Gregory T. Pederson, and Jeannine-Marie St-Jacques. "Hydroclimatology of the Missouri River Basin." Journal of Hydrometeorology 19, no. 1 (2018): 161–82. http://dx.doi.org/10.1175/jhm-d-17-0155.1.

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Abstract Despite the importance of the Missouri River for navigation, recreation, habitat, hydroelectric power, and agriculture, relatively little is known about the basic hydroclimatology of the Missouri River basin (MRB). This is of particular concern given the droughts and floods that have occurred over the past several decades and the potential future exacerbation of these extremes by climate change. Here, observed and modeled hydroclimatic data and estimated natural flow records in the MRB are used to 1) assess the major source regions of MRB flow, 2) describe the climatic controls on streamflow in the upper and lower basins , and 3) investigate trends over the instrumental period. Analyses indicate that 72% of MRB runoff is generated by the headwaters in the upper basin and by the lowest portion of the basin near the mouth. Spring precipitation and temperature and winter precipitation impacted by changes in zonal versus meridional flow from the Pacific Ocean play key roles in surface water supply variability in the upper basin. Lower basin flow is significantly correlated with precipitation in late spring and early summer, indicative of Atlantic-influenced circulation variability affecting the flow of moisture from the Gulf of Mexico. Although increases in precipitation in the lower basin are currently overriding the effects of warming temperatures on total MRB flow, the upper basin’s long-term trend toward decreasing flows, reduction in snow versus rain fraction, and warming spring temperatures suggest that the upper basin may less often provide important flow supplements to the lower basin in the future.
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