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Journal articles on the topic 'Runoff trends'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Zhang, Along, Ruizhong Gao, Xixi Wang, Tingxi Liu, and Lijing Fang. "Historical Trends in Air Temperature, Precipitation, and Runoff of a Plateau Inland River Watershed in North China." Water 12, no. 1 (2019): 74. http://dx.doi.org/10.3390/w12010074.

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Understanding historical trends in temperature, precipitation, and runoff is important but incomplete for developing adaptive measures to climate change to sustain fragile ecosystems in cold and arid regions, including the Balagaer River watershed on the Mongolian Plateau of northeast China. The objective of this study was to detect such trends in this watershed from 1959 to 2017. The detection was accomplished using a Mann-Kendall sudden change approach at annual and seasonal time scales. The results indicated that the abrupt changes in temperature preceded that in either runoff or precipitat

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2

Stahl, K., L. M. Tallaksen, J. Hannaford, and H. A. J. van Lanen. "Filling the white space on maps of European runoff trends: estimates from a multi-model ensemble." Hydrology and Earth System Sciences Discussions 9, no. 2 (2012): 2005–32. http://dx.doi.org/10.5194/hessd-9-2005-2012.

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Abstract. An overall appraisal of runoff changes at the European scale has been hindered by "white space" on maps of observed trends due to a paucity of readily-available streamflow data. This study tested whether this white space can be filled using estimates of trends derived from model simulations of European runoff. The simulations stem from an ensemble of eight global hydrological models that were forced with the same climate input for the period 1963–2000. A validation of the derived trends for 293 grid cells across the European domain with observation-based trend estimates, allowed an a

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3

Hamlet, Alan F., Philip W. Mote, Martyn P. Clark, and Dennis P. Lettenmaier. "Twentieth-Century Trends in Runoff, Evapotranspiration, and Soil Moisture in the Western United States*." Journal of Climate 20, no. 8 (2007): 1468–86. http://dx.doi.org/10.1175/jcli4051.1.

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Abstract A physically based hydrology model is used to produce time series for the period 1916–2003 of evapotranspiration (ET), runoff, and soil moisture (SM) over the western United States from which long-term trends are evaluated. The results show that trends in ET in spring and summer are determined primarily by trends in precipitation and snowmelt that determine water availability. From April to June, ET trends are mostly positive due primarily to earlier snowmelt and earlier emergence of snow-free ground, and secondarily to increasing trends in spring precipitation. From July to September

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4

Sharif, M., D. R. Archer, H. J. Fowler, and N. Forsythe. "Trends in timing and magnitude of flow in the Upper Indus Basin." Hydrology and Earth System Sciences 17, no. 4 (2013): 1503–16. http://dx.doi.org/10.5194/hess-17-1503-2013.

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Abstract. River flow is a reflection of the input of moisture and its transformation in storage and transmission over the catchment. In the Upper Indus Basin (UIB), since high-altitude climate measurement and observations of glacier mass balance are weak or absent, analysis of trends in magnitude and timing in river flow provides a window on trends and fluctuations in climate and glacier outflow. Trend analysis is carried out using a Mann–Kendall nonparametric trend test on records extending from 1960 to 1998. High-level glacial catchments show a falling trend in runoff magnitude and a declini

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Sharif, M., D. R. Archer, H. J. Fowler, and N. Forsythe. "Trends in timing and magnitude of flow in the Upper Indus Basin." Hydrology and Earth System Sciences Discussions 9, no. 9 (2012): 9931–66. http://dx.doi.org/10.5194/hessd-9-9931-2012.

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Abstract. River flow is a reflection of the input of moisture and its transformation in storage and transmission over the catchment. In the Upper Indus Basin (UIB), since high altitude climate measurement and observations of glacier mass balance are weak or absent, analysis of trends in magnitude and timing in river flow provides a window on trends and fluctuations in climate and glacier outflow. Trend analysis is carried out using a Mann-Kendall nonparametric trend test on records extending from 1960 to 1998. High level glacial catchments show a falling trend in runoff magnitude and a declini

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Stahl, K., L. M. Tallaksen, J. Hannaford, and H. A. J. van Lanen. "Filling the white space on maps of European runoff trends: estimates from a multi-model ensemble." Hydrology and Earth System Sciences 16, no. 7 (2012): 2035–47. http://dx.doi.org/10.5194/hess-16-2035-2012.

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Abstract. An overall appraisal of runoff changes at the European scale has been hindered by "white space" on maps of observed trends due to a paucity of readily-available streamflow data. This study tested whether this white space can be filled using estimates of trends derived from model simulations of European runoff. The simulations stem from an ensemble of eight global hydrological models that were forced with the same climate input for the period 1963–2000. The derived trends were validated for 293 grid cells across the European domain with observation-based trend estimates. The ensemble

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7

Wang, G. Q., X. L. Yan, J. Y. Zhang, et al. "Detecting evolution trends in the recorded runoffs from the major rivers in China during 1950–2010." Journal of Water and Climate Change 4, no. 3 (2013): 252–64. http://dx.doi.org/10.2166/wcc.2013.021.

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Evolution trends as well as abrupt changes in recorded runoffs from the major rivers in China during 1950–2010 were investigated using the Mann–Kendall test and ordered clustering analysis. Results show that the recorded runoff series at ten key hydrometric stations on the major rivers in China are characterized by a general decreasing trend. A significant decrease has occurred at six stations: Yichang, Huayuankou, Guantai, Shixiali, Tieling and Haerbin stations, which are located on the northern major rivers. Abrupt changes in runoff series are detectable for the Yellow River (1986), the Hai

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8

Kumar, Sandeep, and Santosh. "Non-Parametric and Parametric Analysis of Runoff in Satluj River Basin, Himachal Pradesh, India." International Letters of Chemistry, Physics and Astronomy 54 (July 2015): 15–36. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.54.15.

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Testing the significance of observed trends in hydrological time series has received a great attention recently, especially in connection with climate change. The changing pattern of runoff deserves urgent and systematic attention over a basin for planning, development, utilisation and management of water resources. Therefore, one large catchment i.e. Indian part of Satluj River Basin is selected for the present study. The daily data of runoff were converted to monthly and then computed to seasonal and annual series. The missing values in the data were computed by using average method. For bet

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9

Mernild, Sebastian H., Glen E. Liston, Christopher A. Hiemstra, Jacob C. Yde, and Gino Casassa. "Annual River Runoff Variations and Trends for the Andes Cordillera." Journal of Hydrometeorology 19, no. 7 (2018): 1167–89. http://dx.doi.org/10.1175/jhm-d-17-0094.1.

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Abstract We analyzed modeled river runoff variations west of the Andes Cordillera’s continental divide for 1979/80–2013/14 (35 years). Our foci were annual runoff conditions, runoff origins (rain, snowmelt, and glacier ice), and runoff spatiotemporal variability. Low and high runoff conditions were defined as occurrences that fall outside the 10th (low values) and 90th (high values) percentile values of the period of record. SnowModel and HydroFlow modeling tools were used at 4-km horizontal grid increments and 3-h time intervals. NASA Modern-Era Retrospective Analysis for Research and Applica

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10

Chi, Kaige, Zhao Gang, Bo Pang, and Ziqian Huang. "Multiple time scale analysis of sediment and runoff changes in the Lower Yellow River." Proceedings of the International Association of Hydrological Sciences 379 (June 5, 2018): 357–62. http://dx.doi.org/10.5194/piahs-379-357-2018.

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Abstract. Sediment and runoff changes of seven hydrological stations along the Lower Yellow River (LYR) (Huayuankou Station, Jiahetan Station, Gaocun Station, Sunkou Station, Ai Shan Station, Qikou Station and Lijin Station) from 1980 to 2003 were alanyzed at multiple time scale. The maximum value of monthly, daily and hourly sediment load and runoff conservations were also analyzed with the annually mean value. Mann–Kendall non-parametric mathematics correlation test and Hurst coefficient method were adopted in the study. Research results indicate that (1) the runoff of seven hydrological sta

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11

Chang, Jianxia, Jie Wei, Yimin Wang, Meng Yuan, and Jiacheng Guo. "Precipitation and runoff variations in the Yellow River Basin of China." Journal of Hydroinformatics 19, no. 1 (2016): 138–55. http://dx.doi.org/10.2166/hydro.2016.047.

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Runoff in the Yellow River (YR) of China is steadily declining due to climate change and human activities. In this study, the basic trend and abrupt changes of precipitation at 63 meteorological stations and runoff as measured at six hydrological stations from 1956 to 2010 are analyzed. Results indicate that 38 stations exhibit negative precipitation trends. These stations are mainly located in the lower reaches. All six hydrological stations exhibit declining runoff trends. Abrupt runoff changes were mainly noted in the downstream portion of the basin. These variations then expanded to the mi

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12

Kliment, Z., and M. Matoušková. "Long-term trends of rainfall and runoff regime in upper Otava River basin." Soil and Water Research 3, No. 3 (2008): 155–67. http://dx.doi.org/10.17221/2/2008-swr.

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The floods experienced recently in the Czech Republic gave rise to numerous discussions over the changed environment and related potential impacts on the rainfall and runoff processes. The main aim of our research project was to determine long term trends of rainfall and runoff regime in Otava River basin. The rainfall-runoff analyses using both the single and double mass curves over the period of the hydrologic observations were taken as a basic method. Beside mean discharge, precipitation, snow and air temperature trends, analysis of land cover change and human impact on the river network an

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Mernild, Sebastian H., and Glen E. Liston. "Greenland Freshwater Runoff. Part II: Distribution and Trends, 1960–2010." Journal of Climate 25, no. 17 (2012): 6015–35. http://dx.doi.org/10.1175/jcli-d-11-00592.1.

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Abstract Runoff magnitudes, the spatial patterns from individual Greenland catchments, and their changes through time (1960–2010) were simulated in an effort to understand runoff variations to adjacent seas and to illustrate the capability of SnowModel (a snow and ice evolution model) and HydroFlow (a runoff routing model) to link variations in terrestrial runoff with ocean processes and other components of Earth’s climate system. Significant increases in air temperature, net precipitation, and local surface runoff lead to enhanced and statistically significant Greenland ice sheet (GrIS) surfa

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Banasik, K., and L. Hejduk. "Long-term changes in runoff from a small agricultural catchment." Soil and Water Research 7, No. 2 (2012): 64–72. http://dx.doi.org/10.17221/40/2011-swr.

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River runoff is an important indicator of environmental changes, which usually include climate and/or land use changes, and is also the basis of catchment water management. This study presents results of monitoring and analysis of 48-year precipitation and runoff from a small agricultural catchment located in central Poland. No land use changes in that period have been reported. Mean monthly distributions of precipitation and runoff for the long-term period showed that July was the wettest month in respect of precipitation and a drier one in respect of runoff, averaging 12.9% and 5.2% of their

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15

Di, Chong-Li, Xiao-Hua Yang, Xing-Hui Xia, Xiao-Juan Chen, and Jian-Qiang Li. "Multi-scale modeling of the response of runoff to climate change." Thermal Science 18, no. 5 (2014): 1511–16. http://dx.doi.org/10.2298/tsci1405511d.

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With global warming, climate change has tremendously changed the hydrological processes. To discover the non-linear trend of the natural runoff and its response to precipitation and temperature in the Yellow River Basin, the non-linear relationships among the runoff, precipitation and temperature are analyzed by the wavelet decomposition and reconstruction methods, partial correlation analysis and multiple linear regression analysis. The main findings of this study are: (1) The annual natural runoff, precipitation and temperature have the similar periods (27-year, 12-year), which indicates tha

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16

Xu, Huashan, Yufen Ren, Hua Zheng, Zhiyun Ouyang, and Bo Jiang. "Analysis of Runoff Trends and Drivers in the Haihe River Basin, China." International Journal of Environmental Research and Public Health 17, no. 5 (2020): 1577. http://dx.doi.org/10.3390/ijerph17051577.

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During the past decades, runoff has been highly influenced by climate change and human activities in Haihe River basin, and it is important to analyze the runoff trends and the drivers of its change to guide water resources management. The Mann–Kendall method and Pettitt test were conducted to analyze the hydrological and climate trends. Data from six sub-basins were used, including runoff at six representative hydrological stations and precipitation and air temperature at 49 meteorological stations. We used multiple-regression analysis and policy review to explore the influence of climate cha

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17

Liu, Guangsheng, and Genxu Wang. "Insight into runoff decline due to climate change in China's Water Tower." Water Supply 12, no. 3 (2012): 352–61. http://dx.doi.org/10.2166/ws.2012.003.

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Water resources in the Three-Rivers Headwater Region (TRHR), ‘China's Water Tower’, have declined in recent years. In particular, the causes and magnitude of declining runoff in the region remain unclear. This study investigated the recent climatic and hydrological trends in the TRHR. We also analyzed the influence of climate change on runoff decline. Meteorological and runoff data on the TRHR since 1961 were used. The results showed that ‘China's Water Tower’ is threatened by climate changes in several ways. The strong warming trend was the main driving factor for runoff decline. Moreover, th

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18

Climent-Soler, D., I. P. Holman, and D. R. Archer. "Application of flow variability analysis to identify impacts of agricultural land-use change on the River Axe, southwest England." Hydrology Research 40, no. 4 (2009): 380–93. http://dx.doi.org/10.2166/nh.2009.093.

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Flow variability analysis based on the annual number and duration of pulses above flow thresholds has been used to identify potential impacts of agricultural land-use change on the River Axe catchment (288.5 km2). The analysis shows significant trend and step changes in runoff response which coincide both with changes in land use and management and with changes in rainfall amount and intensity. The effects of climatic variability are taken into account by regression analysis; residuals from regression continue to show a trend which is ascribed to land-use change. Seasonal analysis indicates th

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19

Lamačová, A., J. Hruška, P. Krám, et al. "Runoff trends analysis and future projections of hydrological patterns in small forested catchments." Soil and Water Research 9, No. 4 (2014): 169–81. http://dx.doi.org/10.17221/110/2013-swr.

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The aims of the present study were (i) to evaluate trends in runoff from small forested catchments of the GEOMON (GEOchemical MONitoring) network during the period 1994&ndash;2011, and (ii) to estimate the impact of anticipated climate change projected by ALADIN-Climate/CZ regional climate model coupled to ARPEGE-Climate global circulation model and forced with IPCC SRES A1B emission scenario on flow patterns in the periods 2021&ndash;2050 and 2071&ndash;2100. There were no general patterns found indicating either significant increases or decreases in runoff on either seasonal or a

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20

Nurtaev, B. "Influence of climate variability on large rivers runoff." Proceedings of the International Association of Hydrological Sciences 371 (June 12, 2015): 211–14. http://dx.doi.org/10.5194/piahs-371-211-2015.

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Abstract. In accordance with IPCC Report the influence of climate change on the water cycle will increase hydrologic variability by means of changing of precipitation patterns, melting of ice and change of runoff. Precipitation has increased in high northern latitudes and decreased in southern latitudes. This study presents an analysis of river runoffs trends in different climatic zones of the world in condition of climate change.

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Shiyin, Liu, Zhang Yong, Zhang Yingsong, and Ding Yongjian. "Estimation of glacier runoff and future trends in the Yangtze River source region, China." Journal of Glaciology 55, no. 190 (2009): 353–62. http://dx.doi.org/10.3189/002214309788608778.

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AbstractGlacier runoff from the Yangtze River source region (YRSR), China, is estimated for the period 1961–2000 using a degree-day approach. In the investigation area, glacier runoff accounts for 11.0% of the total river runoff during the period 1961–2000. In the 1990s its contribution to river runoff rises to 17.0%. Due to the current rate of glacier decline, the impact of glacier runoff on river runoff has recently increased in the source region. Based on two different climate-change scenarios derived from ECHAM5/MPI-OM, future glacier runoff is assessed for the period 2001–50. In all clima

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Wang, Meilin, Yaqi Shao, Qun’ou Jiang, et al. "Impacts of Climate Change and Human Activity on the Runoff Changes in the Guishui River Basin." Land 9, no. 9 (2020): 291. http://dx.doi.org/10.3390/land9090291.

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Guishui River Basin in northwestern Beijing has ecological significance and will be one of the venues of the upcoming Beijing Winter Olympic Games in 2022. However, accelerating climate change and human disturbance in recent decades has posed an increasing challenge to the sustainable use of water in the basin. This study simulated the runoff of the Guishui River Basin using the Soil and Water Assessment Tool (SWAT) model to reveal the spatio-temporal variations of runoff in the basin and the impacts of climate change and human activities on the runoff changes. The results showed that annual r

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23

Alieva, I. S. "SPATIAL-TEMPORARY REGULARITIES OF THE SURFACE AND UNDERGROUND FLOWS OF THE RIVERS OF THE GREAT CAUCASUS." HYDROMETEOROLOGY AND ECOLOGY. PROCEEDINGS OF THE RUSSIAN STATE HYDROMETEOROLOGICAL UNIVERSITY, no. 58 (2020): 41–48. http://dx.doi.org/10.33933/2074-2762-2020-58-41-48.

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The analysis of the statistical structure of the ranges is carried out, the degree of synchronism of fluctuations in runoff characteristics is estimated, and linear trends are identified. The annual values of groundwater runoff have been determined as the arithmetic average of the monthly average minimum winter and summer-autumn water discharges, the surface runoff being calculated as the difference between the annual and groundwater runoff. The stationarity of most of the considered ranges proves to be violated by dispersion or average value. For underground runoff, the number of such ranges

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Alifujiang, Yilinuer, Jilili Abuduwaili, and Yongxiao Ge. "Trend Analysis of Annual and Seasonal River Runoff by Using Innovative Trend Analysis with Significant Test." Water 13, no. 1 (2021): 95. http://dx.doi.org/10.3390/w13010095.

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This study investigated the temporal patterns of annual and seasonal river runoff data at 13 hydrological stations in the Lake Issyk-Kul basin, Central Asia. The temporal trends were analyzed using the innovative trend analysis (ITA) method with significance testing. The ITA method results were compared with the Mann-Kendall (MK) trend test at a 95% confidence level. The comparison results revealed that the ITA method could effectively identify the trends detected by the MK trend test. Specifically, the MK test found that the time series percentage decreased from 46.15% in the north to 25.64%

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Fan, Hongxiang, Ligang Xu, Xiaolong Wang, Yuexia Wu, and Jiahu Jiang. "Identify the influencing paths of precipitation and soil water storage on runoff: an example from Xinjiang River Basin, Poyang Lake, China." Water Supply 18, no. 5 (2017): 1598–605. http://dx.doi.org/10.2166/ws.2017.224.

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Abstract Runoff generation is a complex meteorological-hydrological process influenced by many factors. We analyzed the effects of changes in precipitation and soil water storage (SWS) on runoff generation using the path-analysis method (PAM) in Xinjiang River Basin (XJRB). By using multiple trend analysis we found that precipitation, SWS and runoff in XJRB fluctuated throughout the past 30 years with no monotonic trends at both annual and seasonal scales. Further analysis demonstrated that runoff is more sensitive to precipitation than to SWS in XJRB. PAM results showed that direct influence

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Danilovich, I., D. Wrzesiński, and L. Nekrasova. "Impact of the North Atlantic Oscillation on river runoff in the Belarus part of the Baltic Sea basin." Hydrology Research 38, no. 4-5 (2007): 413–23. http://dx.doi.org/10.2166/nh.2007.025.

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The dynamics of the North Atlantic Oscillation (NAO) and river runoff in the Belarus part of the Baltic Sea basin have been studied. Correlation coefficients between NAO indices and monthly, seasonal and annual discharges were calculated, changes in the runoff in the opposite stages of NAO and its intra-annual distribution were analysed, and runoff trends for different time series were investigated. The closest connection could be observed between NAO indices for December–March and the runoff of Belarusian rivers in the Baltic basin. The highest correlation coefficients were calculated for win

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Okafor, Gloria C., and Kingsley N. Ogbu. "Assessment of the impact of climate change on the freshwater availability of Kaduna River basin, Nigeria." Journal of Water and Land Development 38, no. 1 (2018): 105–14. http://dx.doi.org/10.2478/jwld-2018-0047.

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AbstractChanges in runoff trends have caused severe water shortages and ecological problems in agriculture and human well-being in Nigeria. Understanding the long-term (inter-annual to decadal) variations of water availability in river basins is paramount for water resources management and climate change adaptation. Climate change in Northern Nigeria could lead to change of the hydrological cycle and water availability. Moreover, the linkage between climatic changes and streamflow fluctuations is poorly documented in this area. Therefore, this study examined temporal trends in rainfall, temper

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SHIRAZI, Sharif Moniruzzaman, MD Ibrahim ADHAM, Faridah OTHMAN, Noorul Hasan ZARDARI, and Zubaidah ISMAIL. "RUNOFF TREND AND POTENTIALITY IN MELAKA TENGAH CATCHMENT OF MALAYSIA USING SCS-CN AND STATISTICAL TECHNIQUE." JOURNAL OF ENVIRONMENTAL ENGINEERING AND LANDSCAPE MANAGEMENT 24, no. 4 (2016): 245–57. http://dx.doi.org/10.3846/16486897.2016.1184153.

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This study is focused to identify the surface runoff trends and potentiality of the five watersheds transforming the discrete runoff pattern to smooth patterns. Runoff potentiality was analyzed by Soil Conservation Service Curve Number (SCS-CN) technique. Considering Hydrologic Soil Group (HSG) and percentage of particular land use pattern, weighted cns of five watersheds were found between 82 and 85. Monthly surface runoff trends were investigated by statistical autocorrelation, Mann-Kendall, Sen slope and lowess methods. According to the Mann-Kendall method, no statistical significant monoto

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Oni, S. K., M. N. Futter, K. Bishop, S. J. Köhler, M. Ottosson-Löfvenius, and H. Laudon. "Long-term patterns in dissolved organic carbon, major elements and trace metals in boreal headwater catchments: trends, mechanisms and heterogeneity." Biogeosciences 10, no. 4 (2013): 2315–30. http://dx.doi.org/10.5194/bg-10-2315-2013.

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Abstract. The boreal landscape is a complex, spatio-temporally varying mosaic of forest and mire landscape elements that control surface water hydrology and chemistry. Here, we assess long-term water quality time series from three nested headwater streams draining upland forest (C2), peat/mire (C4) and mixed (C7) (forest and mire) catchments. Acid deposition in this region is low and is further declining. Temporal trends in weather and runoff (1981–2008), dissolved organic carbon concentration [DOC] (1993–2010) and other water quality parameters (1987–2011) were assessed. There was no signific

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Bissenbayeva, Sanim, Jilili Abuduwaili, Dana Shokparova, and Asel Saparova. "Variation in Runoff of the Arys River and Keles River Watersheds (Kazakhstan), as Influenced by Climate Variation and Human Activity." Sustainability 11, no. 17 (2019): 4788. http://dx.doi.org/10.3390/su11174788.

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Runoff formation is a complex meteorological-hydrological process impacted by many factors, especially in the inland river basin. In this study, long-term (1960–2015) river runoff and climate data in the Arys and Keles River watersheds (Kazakhstan) were gathered to analyze the impacts of climate variation and human activity on runoff. The non-parametric Kendall test and the Pettitt test were used to identify trends and change points in the time data series. It was found that both watersheds had significant upward trends in temperature and potential evapotranspiration data, and insignificant up

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McCabe, Gregory J., and David M. Wolock. "Joint Variability of Global Runoff and Global Sea Surface Temperatures." Journal of Hydrometeorology 9, no. 4 (2008): 816–24. http://dx.doi.org/10.1175/2008jhm943.1.

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Abstract Global land surface runoff and sea surface temperatures (SST) are analyzed to identify the primary modes of variability of these hydroclimatic data for the period 1905–2002. A monthly water-balance model first is used with global monthly temperature and precipitation data to compute time series of annual gridded runoff for the analysis period. The annual runoff time series data are combined with gridded annual sea surface temperature data, and the combined dataset is subjected to a principal components analysis (PCA) to identify the primary modes of variability. The first three compon

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Pal, Amar Bahadur, Deepak Khare, Prabhash Kumar Mishra, and Lakhwinder Singh. "TREND ANALYSIS OF RAINFALL, TEMPERATURE AND RUNOFF DATA: A CASE STUDY OF RANGOON WATERSHED IN NEPAL." International Journal of Students' Research in Technology & Management 5, no. 3 (2017): 21–38. http://dx.doi.org/10.18510/ijsrtm.2017.535.

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Purpose: The study has been carried out to investigate and assess the significance of the potential trend of three variables viz. rainfall, temperature and runoff over the Rangoon watershed in Dadeldhura district of Nepal.Methodology: In this study, trend analysis has been carried out on monthly, seasonal and annual basis using the data period between 1979 to 2010 for rainfall and temperature and 1967 to 1996 for runoff. Mann-Kendall test and Sen’s slope estimate test were applied to identify the existing trend direction and Sen’s slope estimator test were used to detect the trend direction an

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Vargas-Castañeda, Gregorio, Laura Alicia Ibáñez-Castillo, and Ramón Arteaga-Ramírez. "Development, classification and trends in rainfall-runoff modeling." Ingeniería Agrícola y Biosistemas 7, no. 1 (2015): 5–21. http://dx.doi.org/10.5154/r.inagbi.2015.03.002.

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Miller, W. Paul, and Thomas C. Piechota. "Regional Analysis of Trend and Step Changes Observed in Hydroclimatic Variables around the Colorado River Basin." Journal of Hydrometeorology 9, no. 5 (2008): 1020–34. http://dx.doi.org/10.1175/2008jhm988.1.

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Abstract Recent research has suggested that changes in temperature and precipitation events due to climate change have had a significant impact on the availability and timing of streamflow. In this study, monthly temperature and precipitation data collected over 29 climate divisions covering the entire Colorado River basin and monthly natural flow data from 29 U.S. Geological Survey (USGS) gauge locations along the Colorado River are investigated for trend or step changes using parametric and nonparametric statistical tests. Temperature increases are persistent (at least 10 climate divisions o

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Bawden, Allison J., Donald H. Burn, and Terry D. Prowse. "Recent changes in patterns of western Canadian river flow and association with climatic drivers." Hydrology Research 46, no. 4 (2014): 551–65. http://dx.doi.org/10.2166/nh.2014.032.

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Climatic variability and change can have profound impacts on the hydrologic regime of a watershed, especially in regions that are sensitive to changes in climate, such as the northern latitudes and alpine-fed regions of western Canada. Quantifying historical spatial and temporal changes in hydrological data can provide useful information as to how water resources are affected by climatic and atmospheric forcings, as well as create an understanding of potential future variability. Trends in western Canadian runoff are examined for the period of 1976–2010. Regional patterns of spatial variabilit

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Rets, E. P., R. G. Dzhamalov, M. B. Kireeva, et al. "RECENT TRENDS Of RIVER RUNOff IN THE NORTH CAUCASUS." GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY 11, no. 3 (2018): 61–70. http://dx.doi.org/10.24057/2071-9388-2018-11-3-61-70.

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Based on observational data from 70 hydrological stations in the North Caucasus an evaluation of present values of mean annual runoff, minimum monthly winter and summer runoff was carried out. Series of maps was drawn. Significant changes in mean annual. minimum monthly and maximum runoff during last decades have been revealed in the North Caucasus. A rise in both amount of water availability and potential natural hazard is characteristic of the most of the North Caucasus that is considered to be caused by recent climate change. Mean annual runoff during 1978-2010 increased compared to 1945-19

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Huntington, T. G., and M. Billmire. "Trends in Precipitation, Runoff, and Evapotranspiration for Rivers Draining to the Gulf of Maine in the United States*." Journal of Hydrometeorology 15, no. 2 (2014): 726–43. http://dx.doi.org/10.1175/jhm-d-13-018.1.

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Abstract Climate warming is projected to result in increases in total annual precipitation in northeastern North America. The response of runoff to increases in precipitation is likely to be more complex because increasing evapotranspiration (ET) could counteract increasing precipitation. This study was conducted to examine these competing trends in the historical record for 22 rivers having &gt;70 yr of runoff data. Annual (water year) average precipitation increased in all basins, with increases ranging from 0.9 to 3.12 mm yr−1. Runoff increased in all basins with increases ranging from

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Kliment, Zdeněk, and Milada Matoušková. "Trends of runoff processes in the Otava River basin." Geografie 110, no. 1 (2005): 32–45. http://dx.doi.org/10.37040/geografie2005110010032.

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Recent floods in the Czech Republic raised many questions about a possible man-made impact on the outflow process. The contribution evaluates runoff changes in the Otava River basin. Attention is paid to the methodology, which is based mainly on the use of mass curves of rainfall and runoff characteristics. Results of analysis are discussed and compared with climatic factors and human activities.

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Jaagus, Jaak, Mait Sepp, Toomas Tamm, Arvo Järvet, and Kiira Mõisja. "Trends and regime shifts in climatic conditions and river runoff in Estonia during 1951–2015." Earth System Dynamics 8, no. 4 (2017): 963–76. http://dx.doi.org/10.5194/esd-8-963-2017.

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Abstract. Time series of monthly, seasonal and annual mean air temperature, precipitation, snow cover duration and specific runoff of rivers in Estonia are analysed for detecting of trends and regime shifts during 1951–2015. Trend analysis is realised using the Mann–Kendall test and regime shifts are detected with the Rodionov test (sequential t-test analysis of regime shifts). The results from Estonia are related to trends and regime shifts in time series of indices of large-scale atmospheric circulation. Annual mean air temperature has significantly increased at all 12 stations by 0.3–0.4 K

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Zhou, Wang, Wu, et al. "Spatiotemporal Variation of Annual Runoff and Sediment Load in the Pearl River during 1953–2017." Sustainability 11, no. 18 (2019): 5007. http://dx.doi.org/10.3390/su11185007.

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Anthropogenic activities have had a great impact on the characteristics of runoff and sediment load along the Pearl River in China in recent decades. We investigated the spatiotemporal variations, including the trends, abrupt changes, and periodicities of annual runoff and sediment load in the Pearl River by using the datasets from nine hydrological stations for the period of 1953–2017. We found that annual runoff was stable during the study period, with only two stations in the upper reach showing decreasing trends. Annual sediment load has generally experienced a significant decreasing trend

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Huang, Qiang, and Jingjing Fan. "Detecting Runoff Variation of the Mainstream in Weihe River." Journal of Applied Mathematics 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/356474.

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The runoff change in Weihe River is significantly decreasing with the climate change and the huge increasing of human activities. The analysis of the variation changes of runoff would provide scientific understanding of Weihe River basin and similar basins. Mann-Kendall method is used to detect the variation changes of annual and seasonal runoff of 1919–2011 at the outlet station, that is, Huaxian station, in the mainstream of Weihe River. The results show that the runoff variation point is 1990, and there were significant changes in trends and periodicals, corroborated by wavelet variance ana

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Hu, Caihong, Li Zhang, Qiang Wu, Shan-e.-hyder Soomro, and Shengqi Jian. "Response of LUCC on Runoff Generation Process in Middle Yellow River Basin: The Gushanchuan Basin." Water 12, no. 5 (2020): 1237. http://dx.doi.org/10.3390/w12051237.

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Runoff reduction in most river basins in China has become a hotpot in recent years. The Gushanchuan river, a primary tributary of the middle Yellow river, Northern China, showed a significant downward trend in the last century. Little is known regarding the relative contributions of changing environment to the observed hydrological trends and response on the runoff generation process in its watershed. On the basis of observed hydrological and meteorological data from 1965–2010, the Mann-Kendall trend test and climate elasticity method were used to distinguish the effects of climate change and

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Zhang, Yong, Yukiko Hirabayashi, Qiao Liu, and Shiyin Liu. "Glacier runoff and its impact in a highly glacierized catchment in the southeastern Tibetan Plateau: past and future trends." Journal of Glaciology 61, no. 228 (2015): 713–30. http://dx.doi.org/10.3189/2015jog14j188.

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AbstractWe investigate past and future trends in glacier runoff and the associated hydrological impacts on river runoff in the Hailuogou catchment, a highly glacierized catchment with extensive debris cover in the southeastern Tibetan Plateau, using a catchment-scale glacio-hydrological model. Past trends in various runoff components of the catchment indicate that glacier runoff has been a large component of total runoff, contributing ∼53.4% of total runoff during the period 1952–2013. Future changes in runoff calculated using the outputs of ten global climate models for representative concent

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Ismaiylov, G. Kh, and N. V. Muraschenkova. "EVALUATION OF POSSIBLE CHANGES IN THE RIVER LINE OF THE OKA BASIN FOR THE COMING PERIOD OF THE FIRST HALF OF THE XXI CENTURY." Ecology. Economy. Informatics.System analysis and mathematical modeling of ecological and economic systems 1, no. 5 (2020): 71–75. http://dx.doi.org/10.23885/2500-395x-2020-1-5-71-75.

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A retrospective analysis and assessment of long-term changes in the annual and seasonal runoff of the Oka River basin over a long 131-year observation period (1881 / 1882–2011/2012) was performed. The changes in the annual distribution of the Oka river runoff over the seasons of the year (spring flood, summer-autumn and winter low water) from its annual value for the selected time periods (before and after 1976/1977) are considered. It has been noted that over the past decades, river runoff has been formed in new climatic conditions associated with global changes and, as a result, regional cli

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Kormann, C., T. Francke, M. Renner, and A. Bronstert. "Attribution of high resolution streamflow trends in Western Austria – an approach based on climate and discharge station data." Hydrology and Earth System Sciences Discussions 11, no. 6 (2014): 6881–922. http://dx.doi.org/10.5194/hessd-11-6881-2014.

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Abstract. The results of streamflow trend studies are often characterised by mostly insignificant trends and inexplicable spatial patterns. In our study region, Western Austria, this applies especially for trends of annually averaged runoff. However, analysing the altitudinal aspect, we found that there is a trend gradient from high-altitude to low-altitude stations, i.e. a pattern of mostly positive annual trends at higher stations and negative ones at lower stations. At mid-altitudes, the trends are mostly insignificant. These trends were most probably caused by the following two main proces

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Cheng, Yang, Hongming He, Nannan Cheng, and Wenming He. "The Effects of Climate and Anthropogenic Activity on Hydrologic Features in Yanhe River." Advances in Meteorology 2016 (2016): 1–11. http://dx.doi.org/10.1155/2016/5297158.

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This paper aims to analyze the effects of precipitation and anthropogenic activity on hydrologic features in Yanhe River so as to provide support for regional water management and evaluation of water and soil conservation measures. Thiessen Polygon was created to calculate mean values of watershed, and Mann-Kendall statistic test and Sen’s slop estimator test were adapted to analyze variation trend and interaction between precipitation, runoff, and sediment discharge. When 1961~1970 was set as reference period (ignoring human effects), the double mass curve quantified the effects of precipitat

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Zhu, Qiuan, Hong Jiang, Changhui Peng, et al. "Assessing the spatio-temporal variation and uncertainty patterns of historical and future projected water resources in China." Journal of Water and Climate Change 4, no. 3 (2013): 302–16. http://dx.doi.org/10.2166/wcc.2013.072.

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The spatial and temporal variation and uncertainty of precipitation and runoff in China were compared and evaluated between historical and future periods under different climate change scenarios. The precipitation pattern is derived from observed and future projected precipitation data for historical and future periods, respectively. The runoff is derived from simulation results in historical and future periods using a dynamic global vegetation model (DGVM) forced with historical observed and global climate models (GCMs) future projected climate data, respectively. One GCM (CGCM3.1) under two

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Saifullah, Muhammad, Zhijia Li, Qiaoling Li, Muhammad Zaman, and Sarfraz Hashim. "Quantitative Estimation of the Impact of Precipitation and Land Surface Change on Hydrological Processes through Statistical Modeling." Advances in Meteorology 2016 (2016): 1–15. http://dx.doi.org/10.1155/2016/6130179.

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Precipitation variability and land surface changes are the two primary factors that affect basin hydrology, and thus estimation of their impact is of great importance for sustainable development at a catchment scale. In this study, we investigated the long-term changes in precipitation and runoff, from 1961 to 2011, in the Yihe River basin by Mann-Kendall test. A new method of trend pattern was put forward and used to identify the trends of precipitation and runoff, which indicated that the basin had a decreasing trend in annual runoff. The change point occurred in the year 1985 dividing the l

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Jasinski, Michael F., Jordan S. Borak, Sujay V. Kumar, et al. "NCA-LDAS: Overview and Analysis of Hydrologic Trends for the National Climate Assessment." Journal of Hydrometeorology 20, no. 8 (2019): 1595–617. http://dx.doi.org/10.1175/jhm-d-17-0234.1.

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Abstract Terrestrial hydrologic trends over the conterminous United States are estimated for 1980–2015 using the National Climate Assessment Land Data Assimilation System (NCA-LDAS) reanalysis. NCA-LDAS employs the uncoupled Noah version 3.3 land surface model at 0.125° × 0.125° forced with NLDAS-2 meteorology, rescaled Climate Prediction Center precipitation, and assimilated satellite-based soil moisture, snow depth, and irrigation products. Mean annual trends are reported using the nonparametric Mann–Kendall test at p &lt; 0.1 significance. Results illustrate the interrelationship betwee

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Ferguson, R. I. "Snowmelt runoff models." Progress in Physical Geography: Earth and Environment 23, no. 2 (1999): 205–27. http://dx.doi.org/10.1177/030913339902300203.

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Models that predict meltwater runoff at a daily timescale are important in water resource management, flood hazard assessment and climate-change impact studies. This article identifies four basic components of such models: meteorological extrapolation, snowmelt estimation at a point, snow-cover depletion and runoff routing. Alternative ways of handling these are discussed, with emphasis on the contrasting treatments in two widely used models: HBV and SRM. Many of the issues in meltwater modelling reflect wider debates in hydrological and environmental modelling, including problems of complexit

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