| 黑河流域地下水同位素特征及其对古气候变化的响应 |
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| 关键词:Heihe River basin groundwater isotopic characteristics paleoclimate renewable rate |
| 基金项目:国家自然科学基金项目(编号:40472126); 国土资源部重点基础研究项目(编号:200010301) |
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| 摘要: |
| Isotopic Characteristics of Groundwater and Its Response to Paleoclimatic Variation in Heihe River Basin |
| Based on field investigations by such means as environmental isotopic features, Tamres model and IAEA model, it is held that the groundwater recharge and renewable rate is related to paleoclimatic variation and that the rainy stages of 8000～5000 a BP, 3500～2500 a BP and last 1000 years are the main groundwater recharge stages in Heihe River basin in Northwest China. The shallow groundwater is relatively young and its renewable rate is greater than that of the confined groundwater. The renewable rate in the eastern area of the middle reaches is greater than that in the western area. The rate is less in the fine soil zone than in the gobi zone under the Qilian Mountain, and the rate is greater near the riverbed than far from the riverbed. The main recharge source of groundwater in the eastern area of the middle reaches is the rain from the Qilian Mountain area, whereas in the western area the source is the snowmelt and the crevice groundwater from the mountain area. It is therefore concluded that by adhering to the natural recharge and renewable regularity of groundwater and regulating and controlling groundwater and surface water in a optimal way, the sustainable utilization of groundwater can be achieved, and the ecological environment can be better protected. |
| ZHANG Guang-hui,CHEN Zong-yu,NIE Zhen-long,LIU Shao-yu,ZHANG Cui-yun,SHEN Jian-mei,WANG Jin-zhe,CHENG Xu-xue,ZHANG He-sheng.2006.Isotopic Characteristics of Groundwater and Its Response to Paleoclimatic Variation in Heihe River Basin[J].Acta Geoscientica Sinica,27(4):341-348. |
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