Research on Scarcity Degree of Chinese Water Environment Capacity and Its Interactions with Regional Function

Water environment capacity is an important factor in restricting sustainable development of regional society,economy and environment,when sustainable development strategy was made,carrying capacity of water environment must be fully considered so as to ensure coordinative development of economy and water environment can be achieved.And the total amount control of water pollutants based on the water environmental capacity theory is the trend of water pollution control.With the rapid development of society and economy,the water pollution problem is becoming increasingly serious in many developing countries.So,it is theoretically and practically significant to study the water environmental capacity and controlling measures of the total amount pollutants discharge among regions in china.Based on the analysis of spatial distribution,utilization and scarcity index of water environment capacity,the interactions between scarcity index of water environment capacity and regional functions were revealed in order to provide theoretical and technical guidance in scientific utilization and development of water environment capacity and developing regional functions in china,the main conclusions were as follows:1)Water environment capacity showed clearly diversity among provinces or cities in china,and it gradually decreasing from southeast coast to west inland;2)The water environmental capacity and its scarcity degree were obviously different among districts.Except few provinces or cities,such as Tianjin,Shanghai,Ningxia and so on,which water environmental capacity were utilized overloaded or oncoming overloading,there are huge amount of available water environment capacity in the others provinces or cities;3)There existed extreme or significant positive relationship between scarcity degree of water environment capacity and many regional social and economic function indexes respectively.It indicated that regional social and economic functions are enhancing with the increase of its water environment capacity,while,the accompanying increase of living and industrial water consumption,emissions of industrial sewage and pollutants would reduce regional ecological functions and water environment capacity,and increase its scarcity degree of water environment capacity in the end.