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[1]YANG Qiannan,GAO Haidong,LI Zhanbin,et al.Effects of Land Use Change in Watershed on Base flow in Arid Area[J].Research of Soil and Water Conservation,2018,25(03):317-322,331.

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Effects of Land Use Change in Watershed on Base flow in Arid Area

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 03 Page number: 317-322,331 Column: Public date: 2018-04-10

Title:: Effects of Land Use Change in Watershed on Base flow in Arid Area

Author(s):: YANG Qiannan¹, GAO Haidong¹, LI Zhanbin^1,2, WANG Jie¹; 1. State Key Laboratory Base of Eco-Hydraulic Engineering in Arid Area, Xi’an University of Technology, Xi’an 710048, China;
2. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, CAS and Ministry of Water Resources, Yangling, Shaanxi 712100, China

Keywords:: base flow; landscape index; land use; upstream of Qingshuihe watershed; arid area

CLC:: S152.7

DOI:: -

Abstract:: Base flow is one of the most important hydrological characteristics of river in arid area during dry season, and has vital functions in keeping runoff and conserving ecology safety. Based on the four stages land use data (1980, 1995, 2000, 2013) in the upstream of Qingshuihe River watershed, and daily runoff data from Yuanzhou Hydrological Station during 1984-2014, this study segmented the base flow by using dry season runoff segment method. Furthermore, we analyzed the relationship among base flow, base flow index, and landscape indices. We also clarified the landscape change effects on base flow. The results showed that:(1) grassland was the main landscape of the upstream from 1984 to 2014, and the biodiversity of the watershed increased with time; (2) runoff magnitude of upstream significantly decreased during 30 years, but the decreased scope of runoff was more significant than base flow; (3) the relationship between landscape indices and base flow was better than runoff. Among five landscape indices, significant positive correlations were obtained between base flow and SHAPE-AM, COHESION, LPI, but significant negative correlations were found between base flow and PRD, PAFRAC.

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