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surface flow 表流,徑流。

surface force

The rapid growth of the population and the large scale development of industry and agriculture in zhangye in the middle reaches of heihe river , and the unreasonable development and utility to the water resource are causing the surface flow of zhengyi valley to reduce day by day , and the ecological environment of egina oasis becomes worsen sharply 然而由于中游張掖市人口的迅速增長和工農業大規模發展,加上對水資源的不合理開發利用,導致正義峽徑流量日益減少,額濟納綠洲的生態環境急劇惡化。

To this area precipitation materials for many years , evaporate materials , surface flow materials , hydrometeorological materials , hydrogeological materials carry on exhaustive analysis , have analysed the state of water resource of the sand district , proceed from the heat of the earth ' s surface is balanced , water yield balanced basic theories , combine the amount of regional water resource set up of the materials , such as scene , hydrology , soil of the sand district , etc . and estimate models , have calculated the surface water , groundwater of this area , has carried on models to examine according to the real data , and has predicted to the state of water resource under different climate change scenes of future that analyse . have put forward the scheme that the water resource in this area utilized rationally , use the non - linear motive force model to predict the precipitation , utilize the materials of actual observation , the natural supply amount of calculating out groundwater of sand ground of balanced principle of the amount of water used at the same time , and can exploiting amount predict to groundwater , district of sand , 本文以寧夏半干旱地區鹽池縣沙地水資源為研究對象,對該地區多年降水資料、蒸發資料、徑流資料、水文氣象資料、水文地質資料進行了詳盡的分析,分析了沙區的水資源狀況,從地表熱量平衡、水量平衡的基本理論出發,結合沙區的氣象、水文、土壤等資料建立了區域水資源量估算模型,計算了該地區的地表水、地下水,根據實際資料進行了模型檢驗,并對未來不同氣候變化情景下的水資源狀況進行了預測分析,提出了該地區水資源合理利用的方案,運用非線性動力模型對降水量進行預測,同時利用實際觀測資料,運用水量平衡原理計算出沙地地下水的天然補給量,并對沙區地下水可開采量進行預測。

The alteration procedure of the underground water level is simulated under drizzle and storm rainfall conditions respectively adopting the coupling fem analysis program of surface flow and subsurface flow . the numerical simulation of the underground water level shows that the drain ditch installed over the slope does not have an notable effect on the underground water level 利用降雨條件下地表水入滲和產流耦合的計算程序,模擬了小降雨強度和大雨強度對地下水位變化的影響,并用數值計算給出了地表排水溝對地下水變化的影響不是很顯著的結論。

The coupling analysis program of surface flow and subsurface flow over porous media is developed based on the conversion principles of water on the surface under rainfall conditions . a new method to judge the saturation of the surface is proposed in this thesis , the convergence is speeded up and the cpu time is saved by using this method 根據非飽和土上水的轉化機理,編制了降雨條件下地表水入滲和產流耦合的計算程序,并根據土-水特征曲線,提出了判斷地表飽和的條件,根據此條件,加速了收斂速度,節省了cpu的時間。

Abstract : this paper uses the topology theory to analyze the surface flow spectrums of straight , positively curved and negatively curved cascades with relative tip clearances of 0 . 023 and 0 . 036 , finds apparent differences of topology and vortex structures in the blade tip and the suction side wall corner of single type of cascade with this two clearances , and studies the mechanism of the difference formation as well as their effects on the energy loss 文摘:應用拓撲原理分析了葉頂相對間隙為0 . 023和0 . 036的渦輪直葉柵和正、反彎葉柵的壁面流譜,發現在兩種間隙下同類葉柵的拓撲與旋渦結構在葉頂和吸力面壁角明顯不同,探討了差別形成的機理及其對能量損失的影響

Based on the hydrogeological conditions , this paper analyzes the styles , damages and mechanism of the water permeation disease , which is divided into fissure water permeation and surface flow water by the water ' s travelling pattern on the sheer 摘要根據花山巖畫區的水文地質與工程地質條件,分析了滲水病害的類型、危害及其形成機理。

Brush question groove , the gap should maintain a certain amount of time to prevent the groove was dry on the second time , it would crash fat from the surface flow , the decline in the quality 待第一遍刷完后,應保持一定的時間間隙,防止第一遍未干就上第二遍,這樣會使漆液流墜發皺,質量下降。

We applied those rainfall - rainoff relation formulas to the whole wenzhou area , and gained flat surface flow - off deepnees distributing map of 100m 100m grid in wenzhou 經確認后又將各月的降雨徑流關系應用于整個溫州地區,因此得到了溫州地區平地上100m 100m的徑流深分布結果。

Appling this idea , we set up exponential relation between runoff deepness and grade . finally we gained terrain surface flow - off deepnees distributing of 100m 100m grid in wenzhou 基于此思想,建立了徑流深與坡度的關系式,并做出了較好的溫州地區的徑流深結果。

Sts maps a id texture to each streamline , and accelerate computing by rendering streamline thickly . sts can simulate animations and visualize 3d surface flows Sts將1d方向紋理映射到流線,利用流線紋理合成2d矢量場的可視化圖象,通過寬度流線繪制加快合成。

Calculation of quantity of soil evaporation takes an important part in moisture content prediction , rainfall surface flow calculation and evaluation of water resources 摘要土壤蒸散發量的計算,在墑情預報、降雨徑流計算及水資源評價中都占有重要的地位。

Tests relating to pavements . surface drainage properties on pervious pavements . part 4 : measurement of surface flow on draining flooring with a constant loading permeater 路面試驗.滲水路面的表層淺水特性.第4部分:連續荷載滲漏器表面排水量的測定

Furthermore , soil and water conservation also resulted in the underground flow decrease but its decrease extent is smaller than of surface flow 水土保持也使河川地下徑流量有所減少,但降低程度較地表徑流量小。

Using the topological rules of the surface flow pattern , the separation configurations on the suction surface at different bowed angles is discussed 應用壁面流譜的拓撲法則,詳細討論了不同彎角下的分離形態。

Errors , like straws , upon the surface flow , he who would search for pearls must dive below 錯誤就像浮在水面的稻草,要想尋找珍珠就得潛到他的下面。

Erroes , like straws , upon the surface flow , he who would search for pearls must dive below 錯誤就像浮在水面的稻草;要想尋找珍珠就得潛到他的下面

Errors , like straws , upon the surface flow ; he who would search for pearls must dive below 錯誤像稻草,漂浮在水面。欲覓珍珠者,須往水下潛。

Near surface flow 表面流近面流

Steady free surface flow 定常無壓流