生态需水量是指一个特定区域内的生态系统的需水量，并不是指单单的生物体的需水量或者耗水量。广义的生态需水量是指维持全球生物地理生态系统水分平衡所需用的水，包括水热平衡、水沙平衡、水盐平衡等；狭义的生态环境用水是指为维护生态环境不再恶化并逐渐改善所需要消耗的水资源总量。
生态环境需水量 Ecological Environment Water Demand
On the basis of the theory about the ecological water requirements at home and abroad, the ecological landscape river water demand model was built and the ecological water demand of 2010 and 2020 was calculated.
在国内外有关生态需水理论的基础上,建立了景观河的生态需水模型,并分别计算了2010和2020年的生态需水量。
参考来源 - 景观河多水源水量水质优化调度研究Finally, the ecological water requirement within different three vegetation landscape was calculated based on evaporation models and "3S" technologies, which provides a new way for calculation of watershed scale ecological water requirement.
建立了适宜于疏勒河流域的生态需水模型，结合生态地下水位埋深值的分析结果和基于“3S”技术的潜水蒸发法和给水度法分别计算了流域内不同植被景观内的植被生态需水量，为流域尺度的面向生态的水资源配置提供了有益的参考。
参考来源 - 面向流域生态安全的景观格局演变研究The water environment carry capacity of Wuliangsuhai lake and weather factors are the most impactors, and the ecological environment water demand is analyzed with different methods.
得出水环境容量及气温是影响乌梁素海富营养化的主要因子的结论,并采用不同的方法分析对乌梁素海湖泊生态需水量进行了研究。
参考来源 - 乌梁素海环境系统评估指标体系的建立及应用Ecological water demand in river channel is figured out definitely, and the ecological water is top-priority in order to suppress the damage to environment in the process of developing suface water.
明确地计算出河道内生态需水量,在开发利用地表水时,生态用水得到优先保证,有效地遏止了水资源开发利用对生态环境的破坏。
参考来源 - 区域水资源评价及优化配置研究Chapter 6, the author explore the calculation methods of ecology water demand about nature vegetation, river, lake in Tarim river watershed.
第六章探讨了塔里木河流域的天然植被、河流和湖泊的生态需水量的计算方法，并计算了塔里木河流域的生态需水量。
参考来源 - 干旱地区内陆河的水文生态特征及其水资源的合理开发利用研究——以塔里木河为例·2,447,543篇论文数据，部分数据来源于NoteExpress
本文正是基于以上目的，研究长江流域内生态环境需水量及流域内水资源的承载能力。
This paper is just based on above purposes to study water resources carrying capacity and ecological environmental water requirements of Yangtze River basin.
对国内外生态环境需水量研究现状作了概述。
The current research status of ecological and environmental water requirement was summarized.
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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