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runoff of rivers
相关语句
  河流径流量
     Characteristics of Runoff of Rivers at the South Slope of Mt.Tuomuer,and Its Response to Arctic Oscillation(AO)
     托木尔峰南麓河流径流量变化特征及其对北极涛动(AO)事件的响应
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  “runoff of rivers”译为未确定词的双语例句
     The strong signals of climatic shift to warm humid pattern have been appearing in the western part of Chinese Tianshan Mountains and neighborhood regions including Northern Xinjiang since 1987. Precipitation, meltwater of glacier and runoff of rivers increase continuously , and results in lake level rising, flood damaged magnification and intensified, vegetation coverage extending and dust storm weaken in western parts of Northwest China.
     1987年起新疆以天山西部为主地区 ,出现了气候转向暖湿的强劲信号 ,降水量、冰川消融量和径流量连续多年增加 ,导致湖泊水位显著上升、洪水灾害猛烈增加、植被改善、沙尘暴减少 .
短句来源
     In order to regulate human activities of water and soil conservation that reduces runoff of rivers, the authors propose methods for reducing water use of water and soil conservation through regulating and controlling target of ecological construction, properly choosing tree and grass species or its distribution mode, on the basis of analyzing influential factors of water use of water and soil conservation.
     为了调节人类水土保持活动对河川径流的减少作用,在分析水土保持用水影响因素的基础上,提出了从调控生态建设目标、调节生物措施与工程措施的比例、合理选用树种、草种及配置模式等减少水土保持用水量的途径。
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  相似匹配句对
     Forest and Slope-runoff
     森林对坡面产流的影响研究
短句来源
     Forest and Slope-Runoff
     森林与坡面产流研究
短句来源
     Analysis of The Characters of The Runoff of The Xinjiang Rivers
     新疆河流径流特征分析
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  runoff of rivers
1.Erosion of the coastal strip of the Black Sea within Georgia, which is of unique value for resort use, occurs under natural conditions of the runoff of rivers emptying into the sea.
      
The formation mechanism of heavy metal fluxes migrating with the solid runoff of rivers and composing more than 90 wt % of the metals involved in the system of water migration was studied.
      


The exploitation and utilization of water resources affects environmental development and quality. In the early 1970's water resource in Hai He and Luan He drainage basins was exploited and utilized very greatly, once the natural environment was changed enormously. In the past 35 years, the total storage of new reservoirs was 25.9 billion cubic meters, and areas of new agricultural irrigation was 100 million mu, at the same time questions of flood control and water supply in cities, industrial and mining areas...

The exploitation and utilization of water resources affects environmental development and quality. In the early 1970's water resource in Hai He and Luan He drainage basins was exploited and utilized very greatly, once the natural environment was changed enormously. In the past 35 years, the total storage of new reservoirs was 25.9 billion cubic meters, and areas of new agricultural irrigation was 100 million mu, at the same time questions of flood control and water supply in cities, industrial and mining areas were partly solved, About 10.17 million mu of saline-alkali soil were improved and 23 million mu of low-lying and frequently flooded land were treated in a comprehensive way The drainage conditions in the plain of China were improved and soil has been changed into drab soil. The distribution of water resources in time and space varied greatly. The average annual discharge to the sea has been decreased half as much as the amount of 21 billion cubic meters in 1965 Utilizing ratio of water resources increased from 23% in the 1950' s to 59% in the 1970's. Annual extraction of groundwater amounted to 17.8 billion cubic meters, Groundwater levels went down and infiltration of precipitation increased. The utilizable and effective water resources that changed from evaporation of groundwater by some rational ways amounted annually to about 2 bilion cubic meters per year. The changes in the elements of water balance gave rise to harmful changes in environment, the main aspects being as follows.( 1 ) Natural water area of river and lakes greatly decreased, and aquatic products and their quality were also decreased due to water pollution and construction of sluice gates.2 ) As drainge of waste water increased, the quality of surface water and ground water deteriorated. The most serious conditions were in the Long Yang He. Generally, the water quality of the first flood each year is very poor.( 3 ) The variation of runoff of rivers often gave rise to siltation of resar-voirs, river courses and estuaries.( 4 ) Exploitation of groundwater in depth made groundwater levels decrease greatly over large area and cause surface subsidence. For instance, the area of land subsidence in Tianjing was 2,308 square km and the highest subsidence was 2.04m. In some areas, deep groundwater contains heavy fluoride and alkali materals, having effects on human health, on soil and plant.( 5 ) Due to decrease of discharge in some rivers, shipping was reduced, indirectly affecting environmental quality.The main reason for harmful impacts on environment is the shortage of water resources. The water transfer from south to north is a strategic measure to solve questions of environmental water conservancy When we consider water supply to cities, industry and agriculture, we must simultaneously consider water supply for fishery, shipping, treatment of siltaion, protection of water quality and tourism We must prevent water pollution and do well for management of environmental water conservancy and assessment of environmental impacts.

水利工程设施对防治旱涝及人民生活起了重要作用,但也出现了对环境不良影响的环境水利问题并指出了解决这些问题的措施和意见。

As the atmospheric concentration of carbon dioxide and othertrace gases increases, changes in global and regional climatic con-ditions will lead to a wide range of hydrologic impacts,includingchanges in the timing and magnitude of runoff and soid moisture,Some. methods for evaluating the regional hydrologic impacts ofglobal climatic changes are presented in this paper. Furthermore,these methods can be combined with state-of-the-art informationfrom general criculation models of the climate and with plausiblehypothetical...

As the atmospheric concentration of carbon dioxide and othertrace gases increases, changes in global and regional climatic con-ditions will lead to a wide range of hydrologic impacts,includingchanges in the timing and magnitude of runoff and soid moisture,Some. methods for evaluating the regional hydrologic impacts ofglobal climatic changes are presented in this paper. Furthermore,these methods can be combined with state-of-the-art informationfrom general criculation models of the climate and with plausiblehypothetical climate-change scenarios to generate information onthe water-resource implications of future climatic changes. In order to assess the climatic variation and to determine theimpacts on meltwater from glacier and snow, variations of runofffrom several glaciated basins in Eurasia during last 30-40 years arealso analysed.It is clear that the effect of dry and hot climate haveintensively advanced the ablation of glacier and snow in wholeTianshan Mts since 1970`s. Runoff of rivers fed by glaciers increasesmarkedly but that by precipitation decreases.

本文介绍了全球气候变化对区域水文影响的一些估算方法,分析了欧亚地区近几十年来几个冰川流域的径流变化,结果表明,由于干、热气候的影响,70年代以来整个天山山区冰川消融非常强烈,冰川补给的河流径流量明显增大,而降水补给的河流径流量显著减小。

Basing on the measured field data of the West Passage of Liaohe Estuary,Haihe Estuary before and after the construction of check gate and Tao—er—he Estuary,it is summarized that besides the tidal discharge volume, there are three important parameters: a. Qr/ Qt, (annual runoff of river)/(annual tidal discharge Volume)b. ΔQt/ΔX,the rate of variation of tidal discharge volume along the course,c. ΔG/ΔQr,the ratio of change of sediment discharge to the change of run—off during the period studied.For the purpose...

Basing on the measured field data of the West Passage of Liaohe Estuary,Haihe Estuary before and after the construction of check gate and Tao—er—he Estuary,it is summarized that besides the tidal discharge volume, there are three important parameters: a. Qr/ Qt, (annual runoff of river)/(annual tidal discharge Volume)b. ΔQt/ΔX,the rate of variation of tidal discharge volume along the course,c. ΔG/ΔQr,the ratio of change of sediment discharge to the change of run—off during the period studied.For the purpose to mimimize the sedimentation below the check gate,in accordance with these parameters given above,the proposals are presented:a. To reconstruct the estuary to a semi—free tidal passage to increase the tidal discharge volume; b. To extend the longitudinal dike below the check gate to minimize sedimentation.

本文根据辽河河口西水道、海河河口建闸前后与套尔河河口的实测资料,总结出淤泥质河口的河床演变,除纳潮量而外,还有三个重要的动力参变数:a.年径流量/年纳潮量即Qr/Qt的比值,b.纳潮量沿程递减率(涨潮)及递增率(落潮)即ΔQt/Δx,c.时段年输沙量减少/时段年径流量减少即ΔG/ΔQr。对于海河河口闸下减淤问题,根据上述与河床演变有关因素,作出了建议:a.把河口段改建成半潮汐通道,及b.提出修建闸下防沙导流堤的原则。

 
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