With the rapid development of population and economy , water resource has been excessively exploited and the balance of ecosystem has been seriously changed and destroyed . the problem of water resource pollution and shortage is becoming more and more serious . the contradiction between exploitation water resource and environment is becoming more and more acute 隨著人口與經濟的迅速發展,人類過度的開發水資源生態空間,生態系統的平衡受到了嚴重地改變和破壞,水環境污染和水資源短缺問題日益嚴重,水資源開發利用與生態環境的矛盾愈顯突出。