Features of Baseflow and Its Influencing Factors for Small Watersheds in Loess Hilly and Gully Region

GUO Jun-ting; ZHANG Zhi-qiang; WANG Sheng-ping; ZHANG Jian-jun; Strauss Peter

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Features of Baseflow and Its Influencing Factors for Small Watersheds in Loess Hilly and Gully Region

- Features of Baseflow and Its Influencing Factors for Small Watersheds in Loess Hilly and Gully Region
- Bulletin of Soiland Water Conservation Vol. 30, Issue 1, Pages: 87-92(2011)
- 作者机构：
  
  1. 北京林业大学水土保持学院,北京,100083
  2. 华北电力大学能源与环境研究中心,北京,102206
  3. The Federal Institute of Land and Water Management Research, A-3252, Petzenkirchen,Austria
- 作者简介：
- 基金信息：
- DOI：
  CLC： X37
- Published：2011
- 稿件说明：
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GUO Jun-ting, ZHANG Zhi-qiang, WANG Sheng-ping, et al. Features of Baseflow and Its Influencing Factors for Small Watersheds in Loess Hilly and Gully Region[J]. Bulletin of Soiland Water Conservation, 2011, 30(1): 87-92.
DOI：

GUO Jun-ting, ZHANG Zhi-qiang, WANG Sheng-ping, et al. Features of Baseflow and Its Influencing Factors for Small Watersheds in Loess Hilly and Gully Region[J]. Bulletin of Soiland Water Conservation, 2011, 30(1): 87-92. DOI：

摘要

基流是河川流量的重要组成部分

尤其在干旱的黄土丘陵沟壑区径流量中占有很高比重

为枯季的河流提供流量补给

对黄土丘陵沟壑区基流的特点和影响因子的研究有助于合理调控水量和高效使用水资源.采用数字滤波法分别对蔡家川6个嵌套小流域2006-2008年日径流量进行基流分割求算基流指数

并且分析了次降雨量、土地利用、植被类型和地形特征等对基流的影响.结果显示

该地区流域的年平均基流指数范围为0.68～0.82.随着次降雨量增加基流指数减小;土地利用类型中的农地、灌丛和人工林对基流产生负影响;基流指数与流域河网密度和河流比降等线性相关.应用多元线性回归分析得出该区域基流指数BFI与次降雨量P

河网密度D和河流比降S成线性关系

进而分析了研究区内无观测数据的流域的基流.

Abstract

Baseflow is an important component of river flow

especially in the arid loess hilly and gully region.It accounts for a large proportion of total runoff and provide additional flow supply to the rivers during the dry seasons.Therefore

the research of baseflow characteristics and its impact factors in this area could contribute to more reasonable water regulations and more efficient uses of water resources.In this paper

digital filtering method was used to separate the baseflow of Caijiachuan basin from 2006to 2008.By calculating the baseflow index (BFI)

controlling factors including precipitation events

land use

vegetation cover and terrain characteristics of the basin were analyzed.The results show that annual BFI averages ranged from 0.68 to 0.82.BFIs decreased with increase of precipitation.Agricultural land

scrub and plantation had negative effects on the base flow.BFIs had a linear relationship with rainfall amounts(P)

river networks densities (D)and river gradients(S).The regression analysis provides a basis to analyze the characteristics of baseflow in ungauged area.

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Related Institution

The State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, CAS & MWR, Yangling

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National Satellite Meteorological Center, China Meteorological Administration

Department of Hydrosciences, School of Earth Sciences and Engineering, Nanjing University

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