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新的和困惑人们的水的问题，引起世界范围要求选择和改革水管理的解决方法。这些问题包括①水的有限供给伴随着水的需求增加；②水质的退化的增加；③水价格结构的改变。④农场商品不确定的国际市场；⑤水权转移的增加；⑥管理水资源的研究机构的改变。灌溉水用于土壤的量取决
The issue of new and perplexing people’s water raises the worldwide solution to the need to choose and reform water management. These include ① limited supply of water accompanied by increased demand for water; ② an increase in degradation of water quality; and ③ a change in the structure of water prices. ④ uncertain international markets for farm commodities; ⑤ increased water rights transfer; and ⑥ changes in research institutions that manage water resources. The amount of irrigation water used in the soil depends