headwater造句

"headwater"是什么意思   

例句与造句

  1. In arid climates, surface water is generally better than ground water in headwater areas, but poorer downstream .
    在干旱气候的上游区,地表水一般较地下水好,但下游的地表较差。
  2. It will lengthen as a result of headwater erosion and, thereby, will cut a valley through both hard and soft rock .
    由于向源侵蚀的结果,它不断延长并且穿过软硬岩石从中切出一条河谷来。
  3. Conclusion : water quality of the headwater is bad
    结论:该市农村水源水水质差。
  4. Study on runoff forecast of baihe river basin in headwater region of the yellow river
    黄河源区白河流域径流预报研究
  5. A study of the geological environmental of suprapermafrost water in the headwater area of the yellow river
    黄河源区冻结层上水地质环境影响研究
  6. It's difficult to find headwater in a sentence. 用headwater造句挺难的
  7. Establishment of management tables system for water amp; amp; soil conservation and headwater conservation forest
    水源涵养林经营数表编制系统的研制
  8. Study on soil and water conservation function of main vegetation category soil in headwater region of the huangpu river
    黄浦江源区主要植被类型土壤水土保持功能研究
  9. According to the requirements of sustainable development in the headwater region of xiaofu river , the groundwater pumping is planned using the optimal control model
    最后直接根据淄博市孝妇河源头地区地下水资源的可持续利用需求,建立了该区的地下水最优控制模型,并求得了最优解。
  10. The results showed that the fractal dimensions of the main stream and down stream gauging staitions were higher those that of the tributary , headwater gauging stations
    结果显示,同一流域干流的日径流过程分维值要明显大于支流的分维值,下游大于上游, 4个水文站分维值年际变化趋势基本保持一致。
  11. Abstract : to improve water quality of a running water plant , headwater of which is the fuyang river in handan city . using bone glue as a coagulant , the static and unstatic experiments are carried out , the optimum bone glue dosage is found out
    文摘:针对邯郸市滏阳河水的水质特点及地表水厂的现状,在不进行大规模的土建改造和大幅度提高运行费用的前提下,采用骨胶作为助凝剂,进行静态实验和动态实验,寻找出骨胶的最佳投量范围,达到了改善水质的目的。
  12. " since the problems of the freshwater biodiversity facing the prd have complex linkages , wwf believes that ultimately an integrated approach is required to address the needs of freshwater for humans as well as various components in the freshwater ecosystems , including the fauna and flora in the headwater and the chinese white dolphins in the estuaries , " concluded mr bohm
    毅理最后总结道:由于珠三角的淡水生物多样性中间存在著复杂的关系,本会认为我们需要一个综合的方式,为人类和淡水生态系统各部份,包括上游源头的动植物,以及在河口栖居的中华白海豚解决对淡水的需要。
  13. The paper introduces and amends the composite indexes of soil erosion intensity and regional soil erosion intensity and conducts quantitative analysis on spatial relationship of types of land use and soil erosion intensity of whole china territory , the middle and lower areas of liaohe river , headwater area of danjiangkou reservoir of south - north water transfer project of hubei part and 4 regions of huidong county in guangdong based on sum up of general study methods of spatial relationship of land use and soil erosion
    摘要在总结土地利用与土壤侵蚀空间关系一般研究方法的基础上,引入并修正了土壤侵蚀强度综合指数和区域土壤侵蚀强度综合指数,时整个中国境内、辽河中下游地区、南水北调丹江口水库水源区湖北部分和广东省惠东县4个区域土地利用类型与土壤侵蚀强度空间关系进行了定量比较分析。
  14. The first geologic reason for degeneration of the eco - environment in the headwater area of the yellow river is that the increase of the recent geologic function caused desertification and grasslands resource decreased and underside changed , destroied the balance of water - air - heat in the area ; the second is that the water environment changes by the degradation and atrophy of frozen earth cause multilayer and synthesis cause of formation degeneration of the eco - environment ; the third is that the man and rats function accelerated degeneration of the eco - environment in the headwater area of the yellow river
    摘要黄河源区生态环境恶化的地质原因之一是现代地质作用增强,形成以荒漠化为主的草地资源退化与下垫面改变,地区水气热平衡破坏;二是因冻土退化、萎缩,引起水环境变异,导致多层面与综合成因的生态环境恶化;三是人为及鼠类活动对源区生态环境恶化起著推波助澜的作用。
  15. It divides the main vegetation of the headwater region of huangpu river into 4 categories based on field survey and observation and methods of factor analysis and systematic cluster analysis and according to the degree of soil and water conservation function : deciduous trees and shrubs are category 1 which shows very strong soil and water conservation function ; tea plantation , grasslands and pine trees are category 2 which has stronger function ; the category 3 is moso bamboos and broadleaved evergreen trees which have stronger permeability and erodibility , but the permeable performance is not outstanding , the capacity of soil moisture storage common and soil and water conservation function moderate and ; the category 4 is uncovered land where the soil and water conservation function is very weak and its permeability , erodibility , erosive resistance and soil moisture storage capacity are all notably smaller than that of the other lands
    摘要在野外调查、实测的基础上,采用因子分析、系统聚类分析的方法,根据土壤层水土保持功能的强弱,将黄浦江源区主要植被类型分为4类:落阔林、灌木林为第一类,表现出很强的水土保持功能;茶园、草地、松林为第二类,土壤水土保持功能较强;毛竹林、常绿阔叶林表现出较强的抗蚀性和抗冲性,但渗透性能并不突出,土壤贮水能力也一般,水土保持功能中等,为第三类;裸露地水土保持性能很差,单独作为第四类,其渗透性、抗蚀性、抗冲性、土壤水库容都显著小于其他各样地。
  16. On the basis of suzihe watershed in dahuofang reservoir headwater , the problems of land and water resources utilization and management are analyzed and countermeasures are advanced in order to insure the headwater can offer the reservoir with good environment , support the reservoir ' s normal function and the whole watershed ecological environment system ' s benign circulation
    以大伙房水库水源涵养区苏子河流域为例,分析目前苏子河流域水土资源开发利用和管理中存在的问题,并提出相应的对策,以确保涵养区为水库提供良好的水源涵养环境,维护水库功能的正常发挥,推动整个流域生态环境系统的良性循环。
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