| Title: | A modeling approach to diagnose the impacts of global changes on discharge and suspended sediment concentration within the Red River Basin |
| Authors: | Wie, X., S. Sauvage, T.P.Q. Le, S. Ouillon, D. Orange, V.D. Vinh and J.-M. Sanchez-Perez |
| Year: | 2019 |
| Journal: | Water |
| Volume (Issue): | 11(5) |
| Pages: | |
| Article ID: | 958 |
| DOI: | 10.3390/w11050958 |
| URL (non-DOI journals): | |
| Model: | SWAT |
| Broad Application Category: | hydrologic and pollutant |
| Primary Application Category: | climate change and human activities change |
| Secondary Application Category: | reservoirs, ponds, lakes and/or other impoundment effects |
| Watershed Description: | 137,200 km^2 Red River (to entrance of the delta), which drains portions of southeast China (49%) and northwest Vietnam (50.1%), and a small portion of northwest Lao PDR (0.9%). |
| Calibration Summary: | |
| Validation Summary: | |
| General Comments: | |
| Abstract: | The Red River basin is a typical Asian river system affected by climate and anthropogenic
changes. The purpose of this study is to build a tool to separate the effect of climate variability and
anthropogenic influences on hydrology and suspended sediments. A modeling method combining
in situ and climatic satellite data was used to analyze the discharge (Q) and suspended sediment
concentration (SSC) at a daily time scale from 2000 to 2014. Scenarios of natural and actual conditions
were implemented to quantify the impacts of climate variability and dams. The modeling gained
satisfactory simulation results of water regime and SSC compared to the observations. Under natural
conditions, the Q and SSC show decreasing tendencies, and climate variability is the main influence
factor reducing the Q. Under actual conditions, SSC is mainly reduced by dams. At the outlet, annual
mean Q got reduced by 13% (9% by climate and 4% by dams), and annual mean SSC got reduced
to 89% (13% due to climate and 76% due to dams) of that under natural conditions. The climate
tendencies are mainly explained by a decrease of 9% on precipitation and 5% on evapotranspiration,
which results in a 13% decrease of available water for the whole basin. |
| Language: | English |
| Keywords: | Red River; SWAT model; hydrology; suspended sediment; dam impacts; climate |