unsaturated soil water flow 中文意思是什麼
unsaturated soil water flow
解釋
土壤非飽和水流- unsaturated : adj. 未飽和的；不飽和的。 unsaturated compounds 不飽和化合物。 unsaturated steam 未飽和蒸汽。
- soil : n 1 泥土，土壤；土質。2 土地，國土。3 滋生地，溫床。4 農業生活，務農。n 1 臟東西，污物，污穢，污...
- water : n 1 水；雨水；露；〈常作 pl 〉 礦泉，溫泉；藥水。2 〈常 pl 〉水體；水域；水道；海；湖；河；海域；...
- flow : vi 1 流，流動。2 （血液等）流通，循環。3 流過；川流不息；（時間）飛逝；（言語等）流暢。4 （衣服、...
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Regard - ing the surface runoff mechanism, liang and xie 1, 2 presented a new surface runoff parameterization which dynamically represents both the horton and dunne runoff generation mechanisms within within a model grid cell together with a consideration of the subgrid - scale het - erogeneity, which can be applied to not only humid regions but also droughty regions as well 3, 4. regard - ing the soil water movement, xie et al. 5 developed an unsaturated flow numerical model based on the finite element method, and xie et al. 6 presented another numerical model to compute soil moisture and water flow flux together by means of a mixed finite element method
在地表徑流方面，文獻1 3發展了一種同時考慮蓄滿超滲產流機制及次網格非均勻性的新的徑流機制模型，並用其改進了陸面模式vic variable infiltration capacity中的徑流計算，該模型既適用於濕潤地區也適用於乾旱地區4 .在土壤水模型方面，文獻5採用有限元質量集中法發展了非飽和土壤水流的數值模型，文獻6則採用混合有限元法建立了非飽和土壤水分含量和通量計算的數值模型 -
( 3 ) when evaporation was stopped during the process of soil water redistribution, soil water would move downslope by gravity. when evaporation was in process, due to low initial water content, most infiltrated water from small intensity and amount of rainfall would be consumed by intensive evapotranspiration during rainy season, and lateral downslope unsaturated flow seldom took place. however, soil water would move downslope by gravitational and matric potential gradients after continuous rainfall
（ 3 ）在防止蒸發條件下，再分佈過程中，土壤水分在重力的作用下有沿坡向下運移的趨勢；在蒸發條件下，由於初始含水量一般較低，雨季量小且分散的降雨極易為強烈的蒸發蒸騰所消耗，側向沿坡向下流難以發生，但在持續的降雨條件下，土壤水分在重力勢和基質勢梯度的作用下易沿坡向下運移。 -
The rule about water flow in the unsaturated soil and the soil - water characteristic curve are described in this thesis in the first time step during the numerical simulation, the permeability coefficient is calculated according to the initial water content of the unsaturated soil, because of as shown in the soil - water characteristic curve has the hysteresis phenomenon
闡述了非飽和土中水流動的基本規律和土水特徵曲線。由於土水特徵曲線具有滯后的特點，提出了根據初始含水量來確定數值模擬初始時步非飽和土的滲透系數。 -
Water moves across the soil surface away from the drip emitter until the infiltration rate of the ponded area matches the emitter discharge rate. beyond this free - water pond water moves into the soil by unsaturated flow. it is very important to research the characteristic and pattern of trickle source infiltration
滴灌條件下水分運移的本質是微源入滲過程，因此，為了充分發揮滴灌優勢，正確調控作物的土壤水分條件，對微源入滲特性規律的研究非常必要。
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