贵州省岩溶地区年径流系数受下垫面影响的分析  

Analysis of Annual Runoff Coefficient Variation and Influenced by Catchment Properties in Guizhou Province

作　　者：吴夏懿[1] 张志才[2] 

机构地区：[1]江苏省地质调查研究院国土资源部地裂缝地质灾害重点实验室,江苏南京210018 [2]河海大学水文水资源学院,江苏南京210098

出　　处：《水电能源科学》2014年第5期6-9,共4页Water Resources and Power

基　　金：国家自然科学基金项目(40930635;41001011)

摘　　要：为研究岩溶地区年径流系数受特殊地貌、地质条件的影响程度,利用贵州省境内23个岩溶流域1961~2000年的径流资料和气象资料,采用Budyko方程拟合表征流域下垫面特征的参数值,并通过Mann-Kendall方法与相关分析,分析年径流系数变化趋势及其与流域下垫面特征的关系。结果表明,贵州省多年平均径流系数的空间分布与流域坡度呈正相关,与碳酸盐岩所占比例呈负相关;1961~2000年年径流系数呈增大趋势,与下垫面特征参数变化趋势一致,可见相对于气候变化,下垫面变化是影响贵州省年径流系数变化的主要因素。Runoff and meteorological data of 23 karst watersheds in Guizhou Province from 1961 to 2000 were chosen to study the impact of annual runoff coefficient by special topography and geological conditions. Based on Budyko equation, the underlying surface characterization parameters were fitted. The annual runoff coefficient variation trend and its relationship with characteristics of the underlying surface were analyzed by Mann-Kendall method and correlation analysis. The results showed that the space distribution of average runoff coefficient in Guizhou Province was positively correlated with basin slope, and was negatively correlated with the proportion of carbonate rocks; there was an increasing trend of runoff coefficient from 1961 to 2000, the same as the trend of underlying surface parameters characteristics. Compared with the climate change, changes in land surface is a major influencing factor of runoff coefficient change in Guizhou Province.

关 键 词：年径流系数 下垫面特征 Budyko方程 岩溶 贵州省 

分 类 号：TV121[水利工程—水文学及水资源] P333[天文地球—水文科学]