建筑論文—地下水中英文對(duì)照-展示頁(yè)
2025-06-16 00:14本頁(yè)面
【正文】 e established.Groundwater quantity is influenced considerably by the quality of the in source waters or degraded quality of source source supplies may seriously impair the quality of the groundwater and industrial wastes entering an aquifer are major sources of organic and inorganic organic pollution of groundwater is infrequent,however,since signficant quantities of organic wastes usually cannot be easily introduced problem is quite different with inordinance are removed only with great addition,the effects of such pollution may continue for indefinite periods since dilution is slow and artificial flushing or treatment is generally impractical or too the water passes through the soiled, a significant increase in the amounts of dissolved salt may salts are added by soluble products of soil weathering and of erosion by rainfall and flowing downstream from heavily irrigation areas may find that the water they are receiving is too saline for satisfactory crop saline contaminates are different to control because removal methods are receive methods are exceedingly possible solution is to dilute with water of lower salt concentration(wastewater treatment plant effluent,for example)so that the average water produced by mixing will be suitable for care should be exercised to protect groundwater storage capacity from irreparable harm through the disposal of waste materials.The volumes of groundwater replaced annually through natural mechanisms are relatively small because of the slow rates of movement of groundwaters and the limited opportunity for surface waters to penetrate the earth39。s surface are called subsurface sources or groundwater storage is considerably in excess of all artificial and nature surface storage in the United distribution may be generally categorize into zones of aeration and asterisked. The saturated zone ia one in which all the voids are filled with water under hydrostatic aeration zone in whiche the interstices are filled partly with air and partly with waters, may be subdivided into three subsonic. The soilwater zone begins at the ground surface and extends downward through the major root zone of fire. Its total depth is variable and dependent on soil type and zone is unsaturated except during period of heavy categor
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