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标题

祁连山北部流域水文相似性与出山径流总量的估计

作者

王旭升

机构

中国地质大学(北京)水资源与环境学院

摘要

祁连山北部河流的出山径流对河西走廊水资源的形成具有决定性作用. 过去对大型出山河流的水文观测和分析基本确定了祁连山北部的降水产流模式, 但由于小型河流缺少观测, 对出山径流总量的估计仍然存在很大的不确定性. 本文根据疏勒河流域、黑河流域和石羊河流域山区水文观测和气象数据, 采用统计模型分析了祁连山北部流域降水- 径流关系的相似性. 结果表明流域出山流量与汇水面积呈现非线性增加趋势, 而蒸散系数随干旱指数增大按照一定的非线性趋势下降. 高程效应使得流域出山流量近似取决于平均降水量的单一函数, 由此估算出祁连山北部的全部出山流量可达(72.3~84.3)×108m3·a-1, 其中石羊河流域、黑河流域的计算结果都大于前人估计值. 疏勒河流域的蒸散作用偏强, 径流估计值需要进行校正. 流域水文相似性有利于减轻水文和气象观测不足造成的影响.

关键词

降水; 蒸散; 产流; 高程效应; 黑河

引用

何广志 陈亚宁 陈亚鹏 王日照. 怪柳根系构型对干旱的适应策略.[J]. 北京师范大学学报(自然科学版),2016,52(3)328-332.

基金

教育部新世纪人才计划资助项目(NCET-12-0949)

分类号

TV121

DOI

10.16360/j.cnki.jbnuns.2016.03.013

Title

Hydrological similarity among catchments and estimation of the total runoff in the North Qilian Mountain, China

Author

WANG Xusheng

Affiliations

College of Pratacultural and Environmental Science Xinjiang Agricultural University; Xinjiang Institute of Ecology and Geography, State Key Laboratory of Desert and Oasis Ecology, Chinese Academy of Sciences; University of Chinese Academy of Sciences

Abstract

The runoff in river basins of the North Qilian Mountain controls water resources in the Hexi Corridor , China . The rainfall-runoff processes in large river basins have been well observed and investigated, whereas observations in small river basins are limited . Therefore, there are uncertainties in estimation of total runoff in the North Qilian Mountain . Hydrological and meteorological data in the Shule River , Heihe River and Shiyang River basins are used to analyze similarity in rainfall-runoff relationship among different river basins according to a statistical model. It was found that stream flow increased nonlinearly with increase in basin area , evapotranspiration ratio decreased with increase in aridity index. Runoff seems only dependent on average precipitation due to altitude effect on rainfall . An approximate formula for runoff versus precipitation was used to estimate total runoff in the North Qilian Mountain, a value of (72.3~84.3 )×108m3·a-1 . The estimated runoff in Heihe River and Shiyang River basins are greater than previously estimated . Evapotranspiration in Shule River basin is significant , the formula need to be corrected. Hydrological similarity among different basins is helpful to reduce negative impacts of limitations in hydrological and meteorological data .

Key words

precipitation ; evapotranspiration ; runoff ; altitude effect ; Heihe River

cite

WANG Xusheng. Hydrological similarity among catchments and estimation of the total runoff in the North Qilian Mountain, China [J]. Journal of Beijing Normal University (Natural Science), 2016,52(3):328-332.

DOI

10.16360/j.cnki.jbnuns.2016.03.013

Copyright © 2014 Journal of Beijing Normal University (Natural Science)
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