It is very important to research the ecological water consumption under the situation that the entironment is seriously degenerated in the lower reaches of the Heihe River Basin.

The paper chooses 365 cities to study the current situation of water demand,water supply and water shortage.

water demand forcasting is the effective way to plan and manage the water resources.

Frame of research work on ecological water demand and key topics;

Quantitative research of ecological water demand based on GIS;

Wastewater recycling for ecological water demand of Shenzhen River-Bay system;

Discussion on the ecological water requirements in electric power engineering;

Analysis of ecological water requirements in Yalong River of West Route of South-to-North Water Transfer Project;

In this paper,the meanings and characteristics of ecological water requirements and ecological irrigation water requirements for urban greenspace system are defined,and the methods are built up.

Analysis of water requirement for urban ecological environment at present in Yinchuan;

Present utilization situations of water resources in Yuncheng and water requirement prediction;

Analysis on water requirement of vegetations of woodland and meadow in the Wulanchabu league under ecological environment;