基于网格水文单元的流域水资源自然再生能力评价  

Natural Renewability Assessment of Water Resources of Jin River Basin based on GRID Hydrological Cell

作　　者：曾维华[1] 孙强[1] 杨志峰[1] 

机构地区：[1]北京师范大学环境学院水环境模拟国家重点实验室,北京100875

出　　处：《干旱区资源与环境》2005年第6期93-97,共5页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金(70273005);国家高科技研究发展计划(2003AA601010)

摘　　要：首先,从水资源自然再生能力的基本概念探讨入手,提出了一种网格水文单元水资源自然更新率概念,用以表证该网格水文单元的水资源自然再生能力;在此基础上,建立了一种全新的水资源自然再生能力评价方法。其次,在基于GRID的泾河流域水量动态平衡模拟基础上,通过逐网格计算泾河流域1996年各月水资源自然更新率,来对泾河流域1996年水资源自然再生能力进行评价。评价结果表明:泾河流域水资源自然再生能力在年内时间尺度上存在明显的准周期运动规律。泾河流域水资源自然更新率在-1.5到1.5之间,4月为最低值,6月为最高值,整个趋势受降水量的影响较大,丰水期与枯水期差别明显。与此同时,泾河流域水资源自然再生能力也存在明显的空间分布规律,具体表现为泾河流域中部的水资源自然再生能力最高,流域南部地区中等,流域北部水资源自然再生能力较弱。水资源的这种空间分布规律主要取决于该流域降水、蒸发,以及植被与土壤等下垫面空间分布规律。First of all, start with the basic concept of the natural renewability of water resources, a concept of renew rate of water resources based on the GRID hydrological cell was proposed in order to represent the natural renewability of water resources of the GRID hydrological cell. On the basis of this, a completely new method of natural water renewability assessment was developed. In the next place, on the basis of dynamic water balance simulation of Jin river basin based on the GRID, the natural water renewability of the river basin in 1996 was assessed by calculating the renew rate of water resources of the river basin grid by grid in 1996. The assessment results indicate there are quasi cycle motion law of natural water resources renewability of Jin river basin in the time scale in years. The natural renew rate of water resources of Jin river basin is between -1.5 and 1.5, and the lowest in the April and the largest in the June. All the trend is influenced by precipitation very much, and there is obvious different between the high water period and law water period. At same time, there is a obvious law of distribution of natural water renewability of Jin river basin in space. It represent concretely that natural water resources renewability is highest in the middle and the west of the Jin river basin, and the lowest in the north. This kind of space distribution of natural water resources renewability is depended on the space distribution law of the precipitation, evaporation and underlying surface of Jin river basin, such as soil and vegetation in the river basin.

关 键 词：水资源再生能力 GRID 泾河流域 水资源更新速率 

分 类 号：TV213.9[水利工程—水文学及水资源]