对生态环境需水进行了分类；
生态环境需水量是当前水资源管理等学科研究的重点和难点。
Study on the ecology water requirement is the emphasis and difficulty for current water resources management.
计算结果表明：2005年湿地生态环境需水量较2000年有所减少。
The eco-environmental water requirement in 2005 was less than that in 2000.
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