【摘要】：為探究地下水補給對氣候變化的響應(yīng),以烏蘭布和沙漠為例,基于氯質(zhì)量平衡法,通過野外打鉆和室內(nèi)離子分析,重建區(qū)域地下水補給歷史和短時間尺度的氣候變化過程。結(jié)果表明:降水對沙漠地區(qū)的地下水補給非常小,對比周邊地區(qū)記錄發(fā)現(xiàn),地下水補給呈現(xiàn)出由西向東逐漸增大的趨勢,且一定程度上反映出賀蘭山對季風(fēng)氣流的阻擋作用,在相關(guān)季風(fēng)較弱年份,賀蘭山西側(cè)降水補給弱于東側(cè)。過去600年來本地區(qū)的氣候波動大,1455—1500AD、1600—1650AD是氣候較為干旱的時期,18世紀(jì)末至19世紀(jì)初是環(huán)境演化一個重要的時間界限,自此以后的漫長時間,干旱化進(jìn)程進(jìn)一步加劇,尤其是1920—1930AD,區(qū)域極端干旱。本研究也驗證了處于季風(fēng)邊緣沙漠地區(qū)降水入滲補給對氣候變化所呈現(xiàn)出的響應(yīng)差異。
[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.
【作者單位】： 蘭州大學(xué)資源環(huán)境學(xué)院/西部環(huán)境教育部重點實驗室;山東農(nóng)業(yè)大學(xué)水利土木工程學(xué)院;
【基金】：國家自然科學(xué)基金項目(41471023,41202174)
【分類號】：P467;P641

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