Response of Runoff and Sediment Yield from Climate Change in the Yanhe Watershed, China

2017 ◽  
Vol 80 ◽  
pp. 30-35 ◽  
Author(s):  
Zongping Ren ◽  
Zhaohong Feng ◽  
Peng Li ◽  
Dan Wang ◽  
Shengdong Cheng ◽  
...  
Keyword(s):  
Climate Change ◽  
Sediment Yield ◽  
Runoff And Sediment Yield

scholarly journals Assessment of Climate Change and Associated Vegetation Cover Change on Watershed-Scale Runoff and Sediment Yield

Water ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1373 ◽  
Author(s):  
Shanghong Zhang ◽  
Zehao Li ◽  
Xiaonan Lin ◽  
Cheng Zhang
Keyword(s):  
Climate Change ◽  
Sediment Yield ◽  
Vegetation Cover ◽  
General Circulation ◽  
Climate Change Scenarios ◽  
Watershed Scale ◽  
Emission Scenarios ◽  
Base Period ◽  
Average Annual Runoff ◽  
Runoff And Sediment Yield

Climate change has an important impact on water balance and material circulation in watersheds. Quantifying the influence of climate and climate-driven vegetation cover changes on watershed-scale runoff and sediment yield will help to deepen our understanding of the environmental effects of climate change. Taking the Zhenjiangguan Watershed in Sichuan Province, China as a case study, three downscaled general circulation models with two emission scenarios were used to generate possible climatic conditions for three future periods of P1 (2020–2039), P2 (2050–2069) and P3 (2080–2099). Differences in scenarios were compared with the base period 1980–1999. Then, a Normalized Difference Vegetation Index climate factor regression model was established to analyze changes to vegetation cover under the climate change scenarios. Finally, a Soil and Water Assessment Tool model was built to simulate the response of runoff and sediment yield in the three future periods under two different scenarios: only changes in climate and synergistic changes in climate and vegetation cover. The temperature and precipitation projections showed a significant increasing trend compared to the baseline condition for both emission scenarios. Climate change is expected to increase the average annual runoff by 15%–38% compared with the base period, and the average annual sediment yield will increase by 4%–32%. The response of runoff and sediment yield varies in different periods, scenarios, and sub-watersheds. Climate-driven vegetation cover changes have an impact on runoff and sediment yield in the watershed, resulting in a difference of 5.8%–12.9% to the total changes. To some extent, the changes in vegetation cover will inhibit the hydrological impact of climate changes. The study helps to clarify the effects of climate and vegetation cover factors on hydrological variations in watersheds and provides further support for understanding future hydrological scenarios and implementing effective protection and use of water and soil resources.

scholarly journals The Influence of Landcover and Climate Change on the Hydrology of the Minjiang River Watershed

Water ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 3554
Author(s):  
Haroon Rashid ◽  
Kaijie Yang ◽  
Aicong Zeng ◽  
Song Ju ◽  
Abdur Rashid ◽  
...  
Keyword(s):  
Climate Change ◽  
Solar Radiation ◽  
Sediment Yield ◽  
Surface Runoff ◽  
Water Yield ◽  
Maximum Precipitation ◽  
Landcover Change ◽  
Minjiang River ◽  
The Individual ◽  
Runoff And Sediment Yield

Changes in the climate and landcover are the two most important factors that influence terrestrial hydrological systems. Today, watershed-scale hydrological models are widely used to estimate the individual impacts of changes in the climate and landcover on watershed hydrology. The Minjiang river watershed is an ecologically and economically important, humid, subtropical watershed, located in south-eastern China. Several studies are available on the impacts of recent climate change on the watershed; however, no efforts have been made to separate the individual contributions of climate and landcover changes. This study is an attempt to separate the individual impacts of recent (1989–2018) climate and landcover changes on some of the important hydrological components of the watershed, and highlight the most influential changes in climate parameters and landcover classes. A calibrated soil and water assessment tool (SWAT) was employed for the study. The outcomes revealed that, during the study period, water yield decreased by 6.76%, while evapotranspiration, surface runoff and sediment yield increased by 1.08%, 24.11% and 33.85% respectively. The relative contribution of climate change to landcover change for the decrease in the water yield was 95%, while its contribution to the increases in evapotranspiration, surface runoff and sediment yield was 56%, 77% and 51%, respectively. The changes in climate parameters that were most likely responsible for changes in ET were increasing solar radiation and temperature and decreasing wind speed, those for changes in the water yield were decreasing autumn precipitation and increasing solar radiation and temperature, those for the increase in surface runoff were increasing summer and one-day maximum precipitation, while those for the increasing sediment yield were increasing winter and one-day maximum precipitation. Similarly, an increase in the croplands at the expense of needle-leaved forests was the landcover change that was most likely responsible for a decrease in the water yield and an increase in ET and sediment yield, while an increase in the amount of urban land at the expense of broadleaved forests and wetlands was the landcover change that was most likely responsible for increasing surface runoff. The findings of the study can provide support for improving management and protection of the watershed in the context of landcover and climate change.

Modeling the impacts of future LULC and climate change on runoff and sediment yield in a strategic basin in the Caatinga/Atlantic forest ecotone of Brazil

CATENA ◽  
2021 ◽  
Vol 203 ◽  
pp. 105308
Author(s):  
José Yure Gomes dos Santos ◽  
Suzana Maria Gico Lima Montenegro ◽  
Richarde Marques da Silva ◽  
Celso Augusto Guimarães Santos ◽  
Nevil Wyndham Quinn ◽  
...  
Keyword(s):  
Climate Change ◽  
Atlantic Forest ◽  
Sediment Yield ◽  
Runoff And Sediment Yield ◽  
Forest Ecotone

Runoff and sediment yield from snowmelt and rainfall as influenced by forage type and grazing intensity

1998 ◽  
Vol 78 (4) ◽  
pp. 699-706 ◽  
Author(s):  
S. I. Gill ◽  
M. A. Naeth ◽  
D. S. Chanasyk ◽  
V. S. Baron
Keyword(s):  
Sediment Yield ◽  
Environmental Sustainability ◽  
Grazing Intensity ◽  
Annual Runoff ◽  
Rainfall Simulation ◽  
Sediment Yields ◽  
Natural Rainfall ◽  
Grazing Intensities ◽  
Grazing Systems ◽  
Runoff And Sediment Yield

Currently, there is interest in Western Canada in extending the grazing season using perennial and annual forages. Of greatest concern is the environmental sustainability of these grazing systems, with emphasis on their ability to withstand erosion. A study to examine the runoff and sediment yields of annual and perennial forages in central Alberta was initiated in 1994. Runoff and sediment yield were quantified under snowmelt and rainfall events for two seasons. Rainfall simulation was used to further examine runoff under growing season conditions. Four forage treatments (two annuals: triticale and a barley/triticale mixture and two perennials: smooth bromegrass and meadow bromegrass) and three grazing intensities (light, medium and heavy) were studied, each replicated four times. Total annual runoff was dominated by snowmelt. Generally runoff volumes, sediment yields, sediment ratios and runoff coefficients were all low. Bare ground increased with increasing grazing intensity and was significantly greater in annuals than perennials for all grazing intensities. Litter biomass decreased with increasing grazing intensity and was generally similar in all species for both years at heavy and medium grazing intensities. Results from the rainfall simulation corroborated those under natural rainfall conditions and generally indicated the sustainability of these grazing systems at this site. Key words: Forages, soil erosion, sustainability, rainfall simulation

scholarly journals Runoff and sediment yield from a small watershed in southeastern Spain (Lanjarón): implications for water quality

2012 ◽  
Vol 57 (8) ◽  
pp. 1610-1625 ◽  
Author(s):  
Víctor Hugo Durán Zuazo ◽  
José Ramón Francia Martínez ◽  
Iván García Tejero ◽  
Carmen Rocío Rodríguez Pleguezuelo ◽  
Armando Martínez Raya ◽  
...  
Keyword(s):  
Water Quality ◽  
Sediment Yield ◽  
Small Watershed ◽  
Southeastern Spain ◽  
Runoff And Sediment Yield
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