滯水含水層 的英文怎麼說
中文拼音 [zhìshuǐhánshuǐcéng]
滯水含水層
英文
perched aquifer-
When soil antecedent condition is dry and the initial rainfall intensity is high, peak surface runoff also considerably lag behind that of rainfall, because of the formation of temporary relative impermeable top layer ; b ) surface runoff is controlled primarily by infiltration - excess runoff mechanism under unsaturated condition ; the major fraction of surface runoff are dominated by saturated infiltration - excess runoff response, only a small fraction by return flow mechanism when soil is saturated ; c ) subsurface flow is dominated by saturated runoff mechanism, and the duration of subsurface post the rainfall end is dependent upon rather the soil properties than the rainfall characteristics ; d ) subsurface flow intensity in cultivated soil layer ( 0 ~ 20cm ) is high up to 35mm / h when rainfall intensity is up to 120mm / h, indicating the existing of macropores and pipe flow in cultivated layer
2 ）耕作制下紫色土的產流主要機制是： 1 ）當雨前土壤含水量未達到飽和狀態時，表面產流起始時間有明顯滯后現象，這與紫色土的快吸水性和較多非毛管孔隙密切相關；當雨前土壤較乾燥，降雨初期雨強較大時，易形成臨時相對不透水表層，表面產流峰也有明顯滯后現象。 2 ）表面徑流的產流方式主要是超滲產流，當土壤達到飽和狀態后，有四川大學博士學位論文小部分回歸流發生，但主要是飽和超滲產流發生，因為紫色土的相對不透水層和其它透水障礙層不明顯。 3 ）壤中流主要是飽和產流，與降雨過程有明顯的滯后，而且雨停后的壤中流產流歷時與降雨特徵無關。( 4 ) at the height of the summer, the surface and bottom water of the creeks differed in n and p loadings. nh4 +, soluble p and total reactive p in the bottom water were higher than those in the surface ; while no3 - and no2 - in the surface were higher than those in the bottom. such water - quality stratification inevitably resulted from the enhancement of phytoplankton in the surface water and intensified release of nh4 + and p from the sediments
（ 4 ）在盛夏高溫季節，水流滯緩的小河流表層水和底層水的氮磷指標存在明顯分異：底層水nh _ 4 ~ + ，水溶態磷和總反應態磷（ trp ）含量高於表層水；而表層水no _ 3 ~ -和no _ 2 ~ -含量高於底層水；表層水的ph和do高於底層水。The simulation result shows that vadose zone can rigorously retard those nuclides with vigorous adsorbility, i. e. the bigger the nuclide decay coefficient is, the more the nuclide is retarded in vadose zone and the less the nuclide concentration in aquifer is, and that the distribution coefficient directive affects the form of the nuclide concentration curve in an aquifer
數值模擬結果表明：包氣帶對于吸附性較強的核素具有很大的阻滯作用，對于低分配系數的核素阻滯作用較弱；衰變系數對含水層中核素的遷移起到了重要作用，隨著衰變系數的增大，地下含水層中的核素體積濃度逐漸降低，並且分配系數的大小直接影響著核素在含水層中體積濃度分佈曲線的形狀。The deep karst groundwater has been clearly investigated on dynamics characters such as the retention time, the transportation speed, the flowing direction etc, and on the hydrodynamic connection with other groundwater aquifers
調查了深部巖溶地下水的滯留時間、運動速度、徑流方向等動力學特徵，以及它們與其它地下含水層之間的水力聯系。分享友人