San Antonio has attempted to secure water from a number of Texas groundwater conservation districts.

圣安东尼奥已尝试从很多地下水保护区获取水资源。

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It based on groundwater percolation theory and water balance or quality conservation builds mathematical model which can reflect the whole regional groundwater movement.

它以地下水渗流理论为基础，从整个计算区域的水量平衡或质量守恒出发，建立反映整个计算区域地下水运动状况的数学模型。

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UNESCO-IHP through its networks and partners actively contributes to the implementation of the Ramsar Convention in particular by identifying and inventorying transboundary aquifers and groundwater dependent ecosystems that are vital for the conservation and wise use of wetlands and their resources.

UNESCO: MEDIA SERVICES