Suspended sediment concentration and its variation with water discharge in a dryland ephemeral channel, northern Negev, Israel

被引：83

作者：

Alexandrov, Y

Laronne, JB

Reid, I

机构：

[1] Ben Gurion Univ Negev, Dept Geog & Environm Dev, IL-84105 Beer Sheva, Israel

[2] Univ Loughborough, Dept Geog, Loughborough LE11 3TU, Leics, England

来源：

JOURNAL OF ARID ENVIRONMENTS | 2003年 / 53卷 / 01期

关键词：

ephemeral channel; flash floods; suspended sediment; hysteresis;

D O I：

10.1006/jare.2002.1020

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Relations between suspended sediment concentration and water discharge during flash floods in an ephemeral stream of the northern Negev are analysed. Water samples were obtained with a pre-programmed sampler. The mean suspended sediment concentration measured during 6 years of monitoring was 34,000 mg l(-1), with individual flood maxima in the range 21,000-229,000 mg l(-1). Regression of suspended sediment concentration on water discharge takes the form SSC=10(4.41) Q(0.42). However, only 50% of the variance in suspended sediment concentration is explained by variations in discharge. This indicates that changes in sediment supply and variations in the importance of source areas are also significant in this semi-arid water catchment. (C) 2002 Elsevier Science Ltd.

引用

页码：73 / 84

页数：12

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