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   of runoff 在 农业基础科学 分类中 的翻译结果: 查询用时:0.488秒
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of runoff
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  径流
    Preliminary opinions on comprehensive measures of soil and water conservation and development of farming based on utilization of runoff from dry cropland
    浅谈水土保持综合治理与发展旱地径流农业
短句来源
    The design and application of the stations with automatic measurement of runoff and sediment in Yichuan
    宜川自动径流泥沙测站的设计及其应用
短句来源
    (3)The variation of road erosion rate can be divided into three stages during which the variation of erosion rate with rainfall process is great from the commence of soil erosion by runoff to 20 min,and from 40 min to the end of runoff erosion processes,and is relatively steady from 20 min to 40 min.
    (3)道路侵蚀率变化过程可分为3个阶段:径流侵蚀开始至20min及40min至侵蚀过程结束,侵蚀率随降雨过程的变化较大,20~40min之间基本稳定;
短句来源
    The results of runoff scouring experiments with a slope range of 3° -30° show that the average flow velocity increased with the discharge of flow and slope gradient and the formula is V=0.096S0.37Q0.13,the slope gradient has bigger effect on velocity than discharge.
    结果表明:坡面径流平均流速随坡度和流量的增加而增大,且坡度对流速的影响大于流量。 其关系式为:V=0.096S~(0.37)Q~(0.13)。
    According to the result of simulated runoff experiment in laboratory, the Effective Depth of Interaction (EDI) of runoff with soil mineral nitrogen is analyzed and the methods to confirm EDI of fertilization experiments and underutilization ones are proposed.
    利用室内模拟降雨试验,初步探讨了径流与土壤矿质氮素的有效作用深度(Effective Depth of Interaction,EDI),对施肥和不施肥试验分别提出用拐点法和反推法确定EDI。
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  “of runoff”译为未确定词的双语例句
    Analysis on the Benefits of Runoff and Sediment Reduction and Their Characteristics in Jinghe Watershed
    泾河流域水沙特性及减水减沙效益分析
短句来源
    Analysis on Variation Trend of Runoff and Sediment of Gushanchuan Watershed
    孤山川流域水沙变化趋势的分析
短句来源
    Analysis on Benefits of Hydraulic Projects and Soil Conservation Measures in Reductions of Runoff and Sediment in Wei River
    渭河流域水利水保措施减水减沙效益初步分析
短句来源
    Benefits of Decreasing Runoff and Sediment and Trend Forecast of Runoff and Sediment Changes in Weihe Watershed
    渭河流域减水减沙效益分析与流域水沙变化趋势预测
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    Analysis of Runoff and sediment Variations in Qingjianhe River
    清涧河水沙变化分析
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  of runoff
Following the principles of runoff-collecting forestry and applying the forest structure investigation results, the authors developed a formula to calculate appropriate density for forests on the basis of different diameters at breast height (DBH).
      
This technique is used to construct a model of runoff transformation for fragments of the Volga basin.
      
Methods of the use of radar information in applied hydrology (in particular, for calculation of runoff probability) are developed.
      
The anthropogenic components of runoff dynamics from drained fields are calculated.
      
However, some components of the total runoff into the Arctic Ocean feature distinct and fairly complicated disturbances in the homogeneity of runoff variations.
      
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In this paepr,the effect of flood retaining of forests have been analyzed in the way of hydrology.The main points are as follows. ①The factors influencing flood retaining of forests are very miscellane- ous.Besides the features of forest itself,what is the most important is the thickness of the soil layer of aeration zone(abbreviated“soil layer”in the following).This is the main reason why the capacities of flood retaining of forests are in great change in different areas. ②The type of runoff generation...

In this paepr,the effect of flood retaining of forests have been analyzed in the way of hydrology.The main points are as follows. ①The factors influencing flood retaining of forests are very miscellane- ous.Besides the features of forest itself,what is the most important is the thickness of the soil layer of aeration zone(abbreviated“soil layer”in the following).This is the main reason why the capacities of flood retaining of forests are in great change in different areas. ②The type of runoff generation is related to siol layer;When soil layer is comparatively thin,the runoff generations can be evaluated according to he model of runoff formation at the natural storage.And the type of runoff generation of very thick soil layer on forest land belongs neither in the model of runoff formation at the natural storage nor in the model of runoff formation in excess of infiltration because under this conditions the soil layers can not be filled up with water.Hence it is a special type of runoff formation. ③The capacity of flood retaining of watersheds(regardless of water- sheds forested or not)can be shown by the maximum water storage of water- shed(Im).Where a storm rainfall amount(or a continuous one)is given by the signal x,the index of antecedent soil moisture by the signal Pa,then the effect reducing flood of watersheds will reduce with the increaing of ratio (X+Pa)/(Im). In accordance with above analysis for the mechanism of flood retaining of forests,it can be considered that in Qin-ba mountainous regions,water- sheds(forested)are possessed of a certain effect of flood retaining in early period of the flood,Which occurred in August,1981(abbreviated“81.8” flood in the following)and they,however,are not possessed of their effect of flood retaining in the late period of the“81.8”flood,because the value Im is low due to thin soil layer in spite of being forested. As for problems of flood control in Hanzhong District,undoubtedly comprehensive means and overall planning must be used in the flood control. And now the first thing is that we must do well the planning,construction and the management of river dykes.

本文用水文学的方法对森林拦洪作用作了分析,主要论点如下:①森林拦洪能力的影响因素十分错综复杂,除森林本身的特点外,最重要的是包气带土层(以下简称土层)的厚度。此即不同地区森林拦洪能力变化很大的主要原因。②林地的产流方式与土层的厚度有关;土层较薄时,可按“蓄满产流”模式计算产流。土层深厚的林地的产流方式既不是“蓄满产流”,也不是“超渗产流”。因为这种情况是蓄不满的,因而是一种特殊产流方式。③流域(不论有林或无林)的拦洪能力均可由流域最大蓄水量(Im)表示,当一次(或一次连续)暴雨量为 x,前期土壤水分指标为 P_ ,则流域的削洪作用随(x+P_ )/(Im)比值的增大而降低。根据上述对森林拦洪的机理分析,可以认为:秦巴山区(有林)的流域在“81.8”洪水前期有一定的拦洪作用。但是由于山区土层薄,虽然有林,但 I_ 小,故在“81.8”洪水后期,流域已失去拦蓄作用。对于汉中地区的防洪问题.无疑,应采用综合治理的措施,进行全面规划。但当前首要措施应将堤防工程的规划、施工与管理作好。

The main regions of sediment yield lie on the both sides of Huang He from Hekouzen to Lunmen, and in the upper and middle reaches of Jinhe, Lohe and Wehe river on the Loess Plateau. The sediment yield is concentrated in the period from July to September, or in one or two rainstorms .The delivery ratio approches to in the watersheds on the Plateau. Sediment yield in a small catchment is the result of both physical factors and human activities.Soil erosion is proportional to the addition of precipitation and the...

The main regions of sediment yield lie on the both sides of Huang He from Hekouzen to Lunmen, and in the upper and middle reaches of Jinhe, Lohe and Wehe river on the Loess Plateau. The sediment yield is concentrated in the period from July to September, or in one or two rainstorms .The delivery ratio approches to in the watersheds on the Plateau. Sediment yield in a small catchment is the result of both physical factors and human activities.Soil erosion is proportional to the addition of precipitation and the depth of runoff and increases with the gradient of the ground surface, while the runoff flow erosion decreases on the slope of over 25°-28°. Clayly loess is present in the south part of the Plateau and coarse loess in the north. Scrub is better for soil conservation than other vegetations. The sediment yield has been increasing in the last 30 years in the lower reaches of the Huanghe. The artificial increase is about 23-35% of the mean transporting sediment.The pattern and intensity of soil erosion vertically change from the top to bottom in the small catchment. Rill erosion dominates in the intergully, and gully bank is an area of multi-functions of water erosion, gravitational and cavern erosions. The sediment output in gully bank is abnut 59% higher that in the Loess region of gullied-hilly, and most sediment yield from the gully bank is in the Loess gullied-table areas.

黄土高原的主要产沙地区是河口镇至龙门黄河干流两侧和泾、洛、渭河中上游,产沙时间集中 7—9月或一、二次暴雨期。流域产沙量与河道断面输沙量基本一致。产沙最与降雨量加径流深组合因子成正比相关,并随坡度增大而增加,坡度超过25—28度水流面蚀强度减弱。砂黄土的可蚀性最大,黄土其次,粘黄土最小。灌木林的防蚀效果最好。近三十年来黄土高原的产沙量进一步增加,其中由人类活动而增加的沙量约占黄河平均输沙量的23~35%。 沟道流域的产沙过程具有垂直分带规律。沟间地以细沟侵蚀产沙为主,沟谷地是水力、重力和洞穴侵蚀综合作用的场所。黄土丘陵区沟谷地的产沙量此沟间地大59.0%左右;黄土塬区产生的泥沙绝大部来自沟谷地。

The proper skeleton and optimal structure of runoff farming system in small basin or valley and the experimental data of the flood-prevent and silt-control are presented. On the basis of the theory of slope runoff, the equation of runoff equilibrium on slope surface is created and the mean dis charge from slopes , which treated by different skills on the surface, is calculated. It is acknowledged that the pool-collecting system of precipitation and water conservation skills provided scientific...

The proper skeleton and optimal structure of runoff farming system in small basin or valley and the experimental data of the flood-prevent and silt-control are presented. On the basis of the theory of slope runoff, the equation of runoff equilibrium on slope surface is created and the mean dis charge from slopes , which treated by different skills on the surface, is calculated. It is acknowledged that the pool-collecting system of precipitation and water conservation skills provided scientific evidences for improving eco-environment in arid areas, rehabilitating desertified lands, closing agricultural environment to control artificially and for finding new water supplies with lower cost and high quantity in dry land areas.

本文通过小流域径流农业系统的合理布局、最佳结构形式以及防洪、防淤的试验研究。根据坡地径流理论,建立坡地表面径流平衡方程,计算了坡面不同技术处理的多年平均流量。降雨集存系统和保水技术对于改善干旱地区生态环境,加速某些地区的沙漠化综合治理,对封闭农业环境进行人工调控,为干旱地区创造成本低、质量高的新水源等提供科学依据。

 
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