The four main types of urban environment calamity were analyzed in detail such as urban road frost heave gas emission from dump ; surface subsidence and subsurface water pollution .

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Research on geochemistry background value for subsurface water in Shanghai

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The region between subsurface water and surface water is the hyporheic zone ( HZ ) with intensive biogeochemical activity .

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With evolution of the hydrothermal metallogenesis when temperature and salinity are progressively decreased ratio of meteoric water / stratum brine in the subsurface water is increased .

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A fundamental research on subsurface water sources pollution from petroleum hydrocarbons was made in the studied area and the main pollutants were identified which had resulted from the long term leakage of petroleum from surficial facilities and their residuals in vadose zone .

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The upwelled process of the Kuroshio subsurface water dilutes the methane concentration in the bottom water on the shelf .

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The Yangtze River diluted water ( YRDW ) and the intruded Kuroshio Subsurface Water ( KU ) are two main sources of nutrients in yellow sea and the east china sea .

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As one of the most important consequences of intruded Kuroshio Subsurface Water the Cold Eddy northeast of Taiwan was mainly studied and its structure nutrient condition and nutrient flux to the East China Sea were also discussed preliminarily .

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The paper explains the role of precipitation infiltration subsurface water and surface water in the small forested watershed .

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This paper expounds the background characteristic of vanadium element and the relationship of its distribution law with the medium composition of subsurface water the redox environment and the acid base degree .

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Subsurface water applications usually permit additional simplification .

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For the first time the Huabei Oil Fields exploited the deep subsurface water below 400 meters in the centre area of Hebei during the middle of 70s .

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This study is concerned essentially with subsurface water .

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A novel technology for treating waste drilling fluid has been developed to treat high salinity waste drilling fluid in Jidong oilfield where high level of subsurface water exists .

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By high-pressure concretion grouting the subsurface water can be prevented and the surrounding rock in the grouting zone and the supporting structures can be combined to bear loads .

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The alimentation relationship between the surface water and the subsurface water is proved .

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The wellhead high pressure wireline control system can conduct close-in tests without bleeding off fluid and pressure and keeping normal subsurface water injection .

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Geologic radar was widely used in near-surface geophysical surveying such as detecting subsurface mineral movement anomaly subsurface water pollution ground pipeline road bet etc.

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The Development and Utilization of the Deep Subsurface Water in the Middle Plain of Hebei Province

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Studies on Biogeochemistry of DMS and DMSP in the Microlayer and Subsurface Water

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Study on calculation of lateral pressure under action of subsurface water

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The result of clustering analysis show that the water masses in the south china sea in upright direction can be divided into five types including the surface layer water subsurface water middle-level water deep level water and deep basin water .

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This paper analyses the laws of drawdown velocity of subsurface water level in the drainage area under the double actions of evaporation and drainage and then suggests a calculation method of the distance between drainage ditches in farmland applicable to any index of evaporation .

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The appearance of new outlet boundary will lead to outlet seepage of subsurface water and the change of mountain seepage field .

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The analytic method of dynamic simulation of combined operation of the surface and subsurface water and its application are presented in this paper .

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Fresh Water Pollution The application and pollution of OPs in foods surface and subsurface water were summarized .

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The results show that the surface tension in the surface microlayer is lower than that of the subsurface water and the surface tension is associated with the DOC .

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This paper analyzes the regularity of water inflow and soil leakage into tunnel and discusses the surface settlement caused by water inflow and the exhaustion of surface water and subsurface water from the angle of the hydrogeology the engineering geology and the underground water dynamics .

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The results shown that surfactant types and its concentration subsurface water properties high temperature and so on affected the role .

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Pollution from of petroleum hydrocarbons in subsurface water sources of Linzi area in Zibo City

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