典型表层岩溶泉域旱季与雨季溶蚀速率分析——以重庆金佛山水房泉流域为例  

Analysis on dissolution rate in subalpine epikarst spring area in dry and rainy seasons: a case of Shuifang Spring area of Jinfo Mountain,Chongqing

作　　者：罗健[1] 李林立[1,2] 李欢欢[1] 张德怀[1] 

机构地区：[1]西南大学地理科学学院,重庆400715 [2]西南大学岩溶环境与石漠化治理研究所,重庆400715

出　　处：《人民长江》2012年第11期90-94,共5页Yangtze River

基　　金：中央高校基本科研业务费支项资金(XDJK201113003);西南大学博士基金(SWU109050);国土资源部岩溶动力学重点实验室开放基金联合资助

摘　　要：溶蚀速率是岩溶进程的重要指标。通过对重庆金佛山水房泉流域内林地、草地、灌丛3种不同土地利用类型下不同深度旱、雨季溶蚀速率的影响因素分析发现,雨季土壤的溶蚀速率大于旱季,各土层溶蚀速率的趋势表现为:林地>灌丛>草地,而旱季溶蚀速率的变化规律不是很明显;雨季林地和灌丛的平均溶蚀速率随着土层深度的增加而减小;不同土地利用类型下的土壤pH值波动较小,且随着土层深度的增加,土壤酸性趋于减弱,溶蚀速率变小;雨季土壤CO2浓度与溶蚀速率均高于旱季。The dissolution rate is an important index of karst process. We introduce the analysis on the soil dissolution rates of carbonate of forestland, grassland and shrub land at different depths in Shuifang Spring of Jinfo Mountain, Chongqing City in rainy season and dry seasons. The analysis results show that the dissolution rate in rainy season is larger than that in dry season, at the same time, the dissolution rate in different depths in rainy season have an obvious order： forestland 〉 shrub 〉 grassland; variation regularity of dissolution rate is not obvious in dry season; the average dissolution rate of woodland and shrub reduce with the depth increasing in rainy season; pH varies little under different land use types, and the acidity and dissolution rate of soil re- duce with soll depth. The soil CO2 concentration and dissolution rate in rainy season are higher than those in dry season.

关 键 词：表层岩溶泉域 土地利用 土壤理化性质 溶蚀速率 

分 类 号：X171[环境科学与工程—环境科学]