洮儿河流域湿地变化对河流径流量影响研究

The influence research of wetland change on runoff in Tao'er River Basin

以洮儿河流域为研究区域,在分析了该流域湿地变化的基础上,探讨了湿地变化与流域径流量之间的关系,定量判别了湿地变化对流域径流量的影响.结果表明:1985—2010年,洮儿河流域沼泽湿地面积的消长对径流量变化具有驱动作用;流域湿地面积减少、水文调节功能下降,年均径流量不断减少,径流量年内变化显著;流域径流量突变发生在1995年,此后,湿地面积减少对径流量的影响逐渐增大,成为2000年以来流域径流量减少的主要因素.

Based on wetland change in Tao＇er River Basin,the paper analyzed the relationship between the wetland change and runoff change in this basin,and made a quantitative evaluation on influence of the wetland change on runoff change.The results indicated that wetland change was a driven factor for runoff change in Tao＇er River Basin during 1985 to 2010.Because the reduction of wetland area and consequent reduction of hydrological regulation function,mean annual runoff from 1985 to 2010was on a drop,and mean monthly runoff from January to December showed great differences.Wetland area reduction showed a strong effect on runoff drop in Tao＇er River Basin after sudden change occurred in1995,and has become a most important factor leading to runoff drop since 2000.