柴河水库入库径流变化特征分析

Variation characteristic analysis on inflow runoff to Chaihe reservoir

本文以柴河水库入库径流量为研究对象,对柴河水库1952～2007年的径流演变规律进行了全面分析。得出:径流量的年际变化比较剧烈,丰枯年间径流量相差较大。易发生少水事件,一定程度上也反映出柴河水库径流量易发生连枯现象。年径流量总体上有减少的趋势,特别是1996年以后,径流量明显减少,显现枯水年增多的趋势。入库径流量的年内分布具有明显的夏季丰水、冬季枯水、春秋过渡的季节性变化。

Take the inflow of Chaihe reservoir as an example, the paper comprehensively analyzes the change regularity of Chaihe reservoir's runoff from 1952 to 2007. The result is that variation of annual runoff is great; the difference of runoff between wet and dry year is great. The phenomenon that the low water occurred easily shows the continuous low runoff of Chaihe reservoir could occurred easily to some extent. The annual runoff presents decreasing tendency, especially after 1996, it decreases significantly, the dry year shows increasing ten- dency. The annual distribution of flow into reservoir with the significant change that the runoff is wet in summer, dry in winter and transition in spring and autumn.