Take Huai an City as an example,the relationship between the industrial structure and the ratio of water utilization by three industries is studied by use of regression analysis.

The niche breadth,niche proportional similarity and niche overlap of the main populations in Masson pine community in different damage phases were measured by taking following community composition types:1)Pinus massoniana + Loropetalum chinense +Quercus fabri,2)P.

The niche breadth,niche proportional similarity and niche overlap of the main tree populations in O.

Quantitative analysis method was used to determine the niche breadth,the proportion of niche similarity and the niche overlap value of main arbor species of C.

<Abstrcat>With quantitative analyzing method, the paper explores and studies the niche breadth, the proportion of niche similarity and the niche overlap of main species of the vegetation layer in C.

Experimental study on ecological water use in a gully catchment of the loess plateau: effects of climate and land use change;

Research on decision-making process and research levels and important concepts of ecological water use and demand;

Primary estimation of ecological water use in Weiganhe river plain oasis;

Innicial Exploration on Quota of Ecological Water in Tarim River;

The deficiency of water must give rise to the problems of agricultural water and ecological water.

The issues about ecological water use are summarized from its concept,background,estimation method and research advances.