喀斯特坡地地表径流系数监测初报  

RESULTS OF PRELIMINARY MONITORING OF SURFACE RUNOFF COEFFICIENTS FOR KARST SLOPES

作　　者：彭韬[1] 王世杰[1] 张信宝[2] 容丽[1] 杨涛[1] 陈波[2] 汪进阳[2] 

机构地区：[1]中国科学院地球化学研究所环境地球化学国家重点实验室,贵州贵阳550002 [2]中国科学院地球化学研究所-贵州省科技厅普定岩溶地质与生态研究综合试验站

出　　处：《地球与环境》2008年第2期125-129,共5页Earth and Environment

基　　金：中国科学院知识创新重要方向项目(KZCX2-YW-306);国家重点基础研究发展计划(2006CB403200)

摘　　要：通过对喀斯特坡地6种不同土地利用条件下径流小区的地表径流和植被穿透雨量以及地下水出口水位变化进行野外定点连续观测研究，结果表明，6个径流小区地表径流系数均非常小，介于0.01％-12.81％。显然，喀斯特坡地的地表径流易于入渗转化为地下径流。受人为活动影响较大的径流小区，地表径流系数随降雨量的变化呈指数函数型变化特征，容易产生地表径流系数的突变式增长。Continuous observations of surface runoff and through fall in six runoff plots with different kinds of land usage, on karst slopes, and groundwater level in the outlet of the catchment, were carried out. The analyses revealed that these surface runoff coefficients in the six plots are very small, varying from 0.01% to 12.81%, demonstrating that the surface runoff is easy to infiltrate and convey to the underground aquifer. The surface runoff coefficient is responding to precipitation as an exponential function in the runoff plots on karst slopes, affected by human impact, which could cause an abrupt increase in surface runoff coefficient.

关 键 词：岩溶坡地 土地利用类型 径流小区 地表径流系数 监测 

分 类 号：P332[天文地球—水文科学]