丹江口水库入出库径流多时间尺度变化特征分析

发布时间：2018-01-15 21:04

本文关键词：丹江口水库入出库径流多时间尺度变化特征分析　出处：《人民长江》2016年22期 　论文类型：期刊论文

【摘要】：为了认识丹江口水库运行对河道径流改变的影响,更好地指导汉江流域水资源利用,采用Morlet小波分析方法,对丹江口水库1956~2012年入库及出库径流序列进行研究,探讨了该水库入出库径流的丰枯变化情况及其准周期特征。研究结果表明,20世纪90年代以前,丹江口水库来水量经历了多次丰枯交替变化过程,其中,60年代中后期、70年代中期和80年代前期为丰水期,其余为枯水期;20世纪90年代以后,丹江口水库来水呈现出整体偏枯的趋势;水库运行对径流的影响主要体现在对年内分配过程的改变上,通过拦蓄汛期洪水,加大了枯期的下泄水量;水库的调蓄并未改变径流的主要周期,入库和出库径流均保持10个月尺度的主周期,其他时间尺度上的周期变化不太明显。
[Abstract]:In order to understand the influence of Danjiangkou reservoir operation on river runoff change and to better guide the utilization of water resources in the Hanjiang River basin, Morlet wavelet analysis method is adopted. The sequence of inflow and outflow runoff of Danjiangkou reservoir from 1956 to 2012 was studied, and the variation and quasi-periodic characteristics of runoff in and out of Danjiangkou reservoir were discussed. Before 1990s, the water supply of Danjiangkou Reservoir underwent many periods of alternation of abundant and dry water, in which the middle and late 1970s and the early period of 80s were abundant water periods, and the rest were dry periods. After 1990s, the water coming from Danjiangkou Reservoir showed a trend of overall withered. The effect of reservoir operation on runoff is mainly reflected in the change of distribution process in the year. The main period of runoff is not changed by reservoir regulation and storage, and the main period of inflow and outflow is maintained at the scale of 10 months, but the period on other time scales is not obvious.
【作者单位】：汉江集团水库调度中心;
【分类号】：TV697.21;TV121
【正文快照】： 南水北调中线一期工程于2014年12月通水运行,作为中线工程水源地的丹江口水库,在水资源配置等方面开始发挥十分重要的作用,工程初期每年从丹江口水库调水95亿m3,能有效地缓解北方部分地区缺水的压力。然而,自20世纪90年代以来,汉江流域持续干旱,对流域的生态环境、水资源合理

【相似文献】