乌兰布和沙漠降水入渗补给对气候变化的响应
发布时间：2019-05-17 06:13
【摘要】：为探究地下水补给对气候变化的响应,以乌兰布和沙漠为例,基于氯质量平衡法,通过野外打钻和室内离子分析,重建区域地下水补给历史和短时间尺度的气候变化过程。结果表明:降水对沙漠地区的地下水补给非常小,对比周边地区记录发现,地下水补给呈现出由西向东逐渐增大的趋势,且一定程度上反映出贺兰山对季风气流的阻挡作用,在相关季风较弱年份,贺兰山西侧降水补给弱于东侧。过去600年来本地区的气候波动大,1455—1500AD、1600—1650AD是气候较为干旱的时期,18世纪末至19世纪初是环境演化一个重要的时间界限,自此以后的漫长时间,干旱化进程进一步加剧,尤其是1920—1930AD,区域极端干旱。本研究也验证了处于季风边缘沙漠地区降水入渗补给对气候变化所呈现出的响应差异。
[Abstract]:In order to explore the response of groundwater recharge to climate change, taking Wulanbuhe Desert as an example, based on chlorine mass balance method, the history of regional groundwater recharge and the climate change process on a short time scale were rebuilt by field drilling and indoor ion analysis. The results show that the groundwater recharge in desert area is very small by precipitation. Compared with the records in the surrounding areas, it is found that the groundwater recharge tends to increase gradually from west to east, and to a certain extent reflects the blocking effect of Helan Mountain on monsoon air flow. In the weak monsoon years, the precipitation supply on the west side of Helan Mountain is weaker than that on the east side. Over the past 600 years, the climate in the region has fluctuated greatly. 1455 1500AD, 1600 1650AD is a period of relatively arid climate, and from the end of the 18th century to the beginning of the 19th century, it is an important time limit for the evolution of the environment. The process of drought is further intensified, especially 1920 / 1930AD, and the regional extreme drought. This study also verifies the response of precipitation infiltration recharge to climate change in desert areas on the edge of the monsoon.
【作者单位】： 兰州大学资源环境学院/西部环境教育部重点实验室;山东农业大学水利土木工程学院;
【基金】：国家自然科学基金项目(41471023,41202174)
【分类号】：P467;P641
本文编号：2478864
[Abstract]:In order to explore the response of groundwater recharge to climate change, taking Wulanbuhe Desert as an example, based on chlorine mass balance method, the history of regional groundwater recharge and the climate change process on a short time scale were rebuilt by field drilling and indoor ion analysis. The results show that the groundwater recharge in desert area is very small by precipitation. Compared with the records in the surrounding areas, it is found that the groundwater recharge tends to increase gradually from west to east, and to a certain extent reflects the blocking effect of Helan Mountain on monsoon air flow. In the weak monsoon years, the precipitation supply on the west side of Helan Mountain is weaker than that on the east side. Over the past 600 years, the climate in the region has fluctuated greatly. 1455 1500AD, 1600 1650AD is a period of relatively arid climate, and from the end of the 18th century to the beginning of the 19th century, it is an important time limit for the evolution of the environment. The process of drought is further intensified, especially 1920 / 1930AD, and the regional extreme drought. This study also verifies the response of precipitation infiltration recharge to climate change in desert areas on the edge of the monsoon.
【作者单位】： 兰州大学资源环境学院/西部环境教育部重点实验室;山东农业大学水利土木工程学院;
【基金】：国家自然科学基金项目(41471023,41202174)
【分类号】：P467;P641
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