目前，这些项目正在100多个国家实施，其重点内容为改进水资源管理工作，提供供水服务，包括供水与卫生服务、灌溉与排水服务以及水电服务。

Operations focus on improving water resource management and extending water services, including water supply and sanitation, irrigation and drainage, and hydropower.

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临界灌排比与灌溉引水量、排水量、河水含盐浓度、排水含盐浓度等因素有关。

Critical ratio of irrigation to drainage is related to the irrigation water volume, drainage water volume, salt content of irrigation water and drainage water and so on.

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