| Water not only is closely related to human survival and development, but also has an important influence with the earth’s ecology and environment. However, with the rapid development of social and economic, over-exploitation of water resources and the emergence of the phenomenon of irrational use, while producing water-related ecological problems. Study on ecological environment water demand will not only help protect water resources and ecological environment, but also promote sustainable economic development, as well as the rational development of water resources and configuration.This paper is mainly based on nearly two decades hydrological data of Tumen River Basin, using statistical analysis, hydrology methods, GIS and remote sensing technology to have environmental water demand quantitative research for its main tributaries---Buerhatong river, Gaya river, Hunchun river. Under the existing ecological water storage, comparative analysis of the tributaries water balance, to provide a data foundation for the Tumen river basin water resources.First, using the minimum monthly average flow method and other hydrology methods derived each tributary in-stream ecological environment water demand, the results showed that:the river runoff of tributary could meet in-stream ecological water demand.Secondly, GIS and remote sensing technology as a platform to divide Tumen river tributary land-use types, which were calculated for area of each vegetation type; using fixed size calculation method for each other tributaries stream environmental water demand. The results showed that: vegetation water demand accounted the ecological environment water demand riverside proportion of total are larger, can be seen, when the water is restricted, vegetation ecosystems are inevitably affected first; industrial water demand of the urban eco-environment water are larger proportion of the total, indicating that the status quo industrial water demand of the tributaries is an important part of urban water demand, the rapid development of industrial demand for water resources become increasingly evident.Finally, according to the sum of the in-stream water demand and stream water demand draw the ecological environment water requirements of the tributaries, refer to the ecological water storage of tributaries to comparative analysis of the tributaries’ water balance. The results showed that:the stream ecological environment of Gaya river is a certain degree of water scarcity, Buerhatong river, Hunchun river in the aggregate performance of not dry, but with the development of social and economic, water supply and demand will be increasingly more emergent. |
