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在地表水体(人工湖或水库)长期作用下,粗颗粒地层(卵石或漂石)形成了复杂的渗透规律,与传统认识存在较大差异。因此,查清人工湖或水库底下的土层渗透规律和地下水分布条件直接关系到工程的安全、造价和工期。该文结合工程实例,初步研究了在地表水体长期作用下粗颗粒地层的渗透规律,突破水文地质学中“含水层”和“隔水层”的传统定义,首次提出“饱水层”的概念。浅层地下水的排泄以垂向渗流为主,深层地下水排泄以径流为主;浅层地下水的补给以地表水补给为主,深层地下水的补给主要是浅层地下水通过非饱水带对其补给。
Under the long-term action of surface water body (artificial lake or reservoir), the coarse grain formation (pebbles or boulders) forms a complex law of infiltration, which is quite different from the traditional understanding. Therefore, to find out the rules of artificial soil infiltration under the artificial lake or reservoir and the groundwater distribution conditions are directly related to the safety, cost and duration of the project. Based on the engineering examples, this paper initially studied the law of permeation of coarse grain strata under long-term action of surface water body, and broke through the traditional definition of “aquifer ” and “aquitard ” in hydrogeology, Water layer "concept. The discharge of shallow groundwater is dominated by vertical seepage, while the groundwater discharge is dominated by runoff. The supply of shallow groundwater is dominated by surface water. The supply of deep groundwater is mainly recharged by shallow groundwater through non-saturated water.