摘要
不同土地利用土壤往往具有不同的水分和CO_(2)特征,进而影响到土下岩溶作用的强度和方向。以重庆金佛山为例,选择两个不同高程的岩溶泉流域,研究了流域内典型土地利用土壤水和土壤CO_(2)的变化,土壤水分特征及土下溶蚀速率,并分析了土下岩溶作用的主要驱动因子。结果表明土下溶蚀作用主要发生在夏季:碧潭泉和水房泉流域不同土地利用土下雨季平均溶蚀量分别占年溶蚀量的65.5%和71.9%。进一步证实土壤CO_(2)和土壤水的滞留时间是驱动岩溶作用的两个关键因子,土壤水传导能力可能是控制旱季土下溶蚀速率的决定性因素。
Land use results in a series of variations of soil physicalchemical property,furthermore influencing on karstification direction and intensity.Taking two spring basins at different elevation in Jinfo Mountain,Chongqing as an example,the authors analyzed the soil water and CO_(2)variation,soil water characteristics,solution rates in soil and their driving factors etc.The results showed that solution of tablets mainly occurs during the rainy season,with the mean weight loss in soil account for 65.5%and 71.9%of annual loss in Bitan and Shuifang spring respectively.It was also proved that soil CO_(2)is an important driving factor for the ground carbonate rock denudation.Soil CO_(2)and the residence time of the water are two major controlling factors which influence the weight loss in tablets placed in the soil.The intension of soil water transmission might be the decisive factor of solution rate in soil in dry season.
作者
章程
ZHANG Cheng(Institute of Karst Geology,Chinese Academy of Geological Sciences,Karst Dynamics Laboratory,Ministry of Land and Resources,Guilin,Guangxi,541004)
出处
《地质论评》
CAS
CSCD
北大核心
2010年第1期136-140,共5页
Geological Review
基金
中国博士后科学基金(编号2005038473)
中国地质科学院岩溶地质研究所所控项目(编号200703)
国家自然科学基金资助项目(编号40772164)
中国地质调查局地质调查项目(编号1212010813111)的成果
