The Study Of Reasonable Allocation Of Water Resources Based On The Input-occupancy-output Technology

Water plays a decisive role in the ecological environment of people's life, the unreasonable utilization of resources and the neglect of the relationship between ecological use of water and ecological environment leads to the ecological deterioration in some regions and river basins while caused a series of ecological environment problems. For the reasonable allocation of water resources, we should follow the principle that we should not only pay attention to water use in living and production but also emphasize the coordination of ecological and domestic water use. For the ecological recovering and rebuilding of the damaged water resources ecosystem, we should pay equal attention to the water use for ecological and living purpose. Therefore, the study on water resources has profound significance in carrying out the reasonable allocation and optimization of water resources to strengthen the sustainable development of economy and environment.Huaibei is a city of resources-contribution type, the majority of the traditional support industries are high water consuming industries, and the contradiction between water resources and economic development is particularly acute. This study takes the reasonable allocation of water resources in Huaibei as the study object by using the Input-occupancy-output technology.The theory basis of input and output mode is General Equilibrium Theory, the input-output modeling technique has advantages in settling the structural problems which reveals the inner connection and objective laws among various departments and links, but the input and output modeling technique has strong premises which leads to the lack of flexibility of itself. In consideration of the feasibility of various methods, we make improvement on the mixed tabulating method and discussed the tabulation process. Bringing the effects of occupancy into the calculation of water resources by drawing into the occupancy part, which can measure the influences of people's life and production activity on the demand of water resources in a more comprehensive and reasonable way.Based on mastering of the characters of water use in economic system in Huaibei, we discussed the way to build the reasonable allocation of water resources in Huaibei from three levels, including adjusting the production structure, adjusting the structure of the final demand, adjusting the structure of intermediate input.We carried out empirical research on the direct water use coefficient, total water use coefficient and ecological water use coefficient, and conducted a real research on the main water use coefficients which affects the total water use coefficients and the total amount of water use. Finally, taking Huaibei as an example, we carried out the empirical research on the structural decomposition of the changes in water resources caused by the final demand change.The smallest value of the direct water use coefficient is 7.21 cubic meter/ï¿¥10,000.-while the highest is 1473.5 cubic meter/ï¿¥10,000.-. There are a few of coefficients which its direct water use coefficients are higher than those of other departments. The water use coefficients in most of the departments are comparatively smaller, which mainly distributed in the secondary industry. For the direct and total water use coefficients, the coefficients in the primary industry are remarkably higher than those in the secondary industry, while the coefficients in the secondary industry are remarkably higher than those in the third industry. For the inner part of the secondary industry, the basic industry has the strongest water use intensity; the light industry takes the second place while the high tech industry follows. In comparison of the coefficients between the direct and the total water use, we can learn that, the departments with the greater direct water use coefficients, its difference between the direct water use coefficients and the total water use coefficients are smaller, the agricultural department has the smallest difference which is 1.36 times, while the difference among other service departments are the greatest, which can reach 31 times.The coefficients in ecological water use are far more than those in the total water use, in general, it is several or more than ten times of the total water use coefficients. The industry with the greatest ecological water use coefficients are agriculture, forestry, animal husbandry. Secondly it is the food manufacturing, manufacturing of clothing, leather, and fur; wood processing and furniture manufacturing; chemical industry; production and supply of power, gas and water.Taking the summation of total water use coefficients as the research object, the distribution of main margin water use coefficients have the following law:the department accounts for a major part of the direct consumption coefficients of its products. Among the 42 main margin water use coefficients,10 of them are of the diagonal line, accounting for 23.8%. For the direct consumption coefficients in agriculture, the main coefficients take account for 16.7%, and there are 6 in production and supply of electric power, gas and water, which accounts for 14.28%, secondly, there are 5 in the direct consumption coefficients in chemical industry, while there are 4 in forestry. Different from the characters with the main margin coefficients in distribution of main coefficients, the average main water use coefficients are mainly distributed concentrative in 6 industries, of which 6 main coefficients are of direct consumption coefficients in agriculture, and there are 5 main coefficients in forestry, while 3 in food manufacturing industry. There are 4 main coefficients of direct consumption coefficients in chemical industry, while 9 main coefficients of direct consumption coefficients in production and supply of power, gas and water.In comparison of the average main coefficients and margin main coefficient of water use, we can learn that there are repetitions between them, in 37 of the average main coefficients of water use,22 are the same as the margin main coefficients of water use,15 are different. In the 42 margin main coefficients of water use, there are 22 coefficients are the same as the average main coefficients of water use, while 27 are different. Taking the total amount of water use as the study target, we always get the similar result.From the comparison conditions of the affected objects by the total amount of water use and total water use coefficients, we noticed that it exists overlapping phenomenon in the two main margin water use coefficients. There are 24 direct consumption coefficients in the overlapping part; the overlapping part is the key of the water resources optimization.Structural decomposition was carried out on the water resources from the final demand level, subdivided the final demand structure into:the influence of the demand model, the influence of the demand structure and the influence of the demand level. For the actual operation, there are great difficulties in optimizing the structure of water resources by changing the final demand structure, but it is feasible for the local government departments in charge to make corresponding policies and regulations according to the actual conditions of the local water resources and the water resources plan.