Baseflow is the portion of streamflow that originates from groundwater. It is pivotal to groundwater supply as well as the interactions between groundwater and surface water. In the Loess Plateau of China, the baseflow plays a fundamental role in sustaining the aquatic ecosystem. Rational estimation of baseflow is of critical importance for understanding the functioning of the groundwater system and informing management of regional water resources. In this study, a two-well parameterised digital filter was used to separate baseflow from observed daily total streamflow on the Weihe River Basin. Two parameters (maximum baseflow index (BFImax) and the recession constant) of this filter were estimated using UKIH and a recession analysis with physical meaning, respectively. The results show that the baseflow index increased from the upstream to downstream (0.27-0.32) of the Weihe River, and the baseflow of the river is summer dominant. In general, the baseflow has been increasing gradually owing to the implementation of soil conservation measures. This study provides an understanding of baseflow response to seasonal variability and water environmental management in basin scale.
1.Shandong Normal Univ, Coll Geog & Environm, Jinan 250358, Shandong, Peoples R China 2.Northwest Univ, Coll Urban & Environm Sci, Shaanxi Key Lab Earth Surface Syst & Environm Car, Xian 710127, Shaanxi, Peoples R China 3.Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 4.Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Hubei, Peoples R China 5.Hubei Prov Collaborat Innovat Ctr Water Resources, Wuhan 430072, Hubei, Peoples R China 6.CSIRO Land & Water, GPO Box 1666, Canberra, ACT 2601, Australia 7.North China Univ Water Resource & Elect Power, Inst Water Conservancy, Zhengzhou 450045, Henan, Peoples R China 8.Australian Natl Univ, Fenner Sch Environm & Soc, Canberra, ACT 2601, Australia
Recommended Citation:
Zhang, Junlong,Song, Jinxi,Cheng, Lei,et al. Baseflow estimation for catchments in the Loess Plateau, China[J]. JOURNAL OF ENVIRONMENTAL MANAGEMENT,2019-01-01,233:264-270