建筑論文—地下水中英文對(duì)照-資料下載頁(yè)
2025-06-07 00:14本頁(yè)面
【正文】 lution 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 supplement this natural recharge process,a recent toward artificial recharge has been developing.In California,for example,artificial recharge is presently a primary method of water methods are employed in artificial recharge of the most mon plans is the utilization of holding usual practice is to impound the water in a series of reservoir arranged so that the overflow of one will enter the next,and so artificial storage works are generally formed by the construction of dikes or second method is the modified streambed,which makes use of the natural water stream channel is widened, leveled,scarified,or treated by a bination of methods to increase its recharge and furrows are also basic types of arrangement are the ground。the lateral type,in which water is diverted into a number of small furrows from the main canal or channel。and the treeshaped or branching type,where water is deferred from the primary channel into successively smeller canalis and ditcher.Where slopes are relatively flat and uniform,floodiing provides an economical means of practice is to spead the recharge water over the ground at relatively small depths so as not to disturb the soil or native additional method is the use of injection rates are normally less than pimping rates for the same head condition,however,because of the clogging that is often encountered in the area adjacent to the well may result from the entrapment of fine aquifer particle, from suspended material in the recharge water which is subsequently strained out and deposited in the vicinity of the well screen,from air binding,from chemical reactions between recharge and natural water,and from best result the recharge water should be clear,contain little or no sodium,and be chlorinated.
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