Study On The Effect Of Water Resources Carrying Capacity Through Sewage Resource Recovery And Industrial Water Use Structural Adjustment In Northwest China

The northwest in China is the most prominent area in the shortage of waterresources. The sustainable development of social-economic in northwest was restrictedwhether by the congenital shortage of water supply, or by the sharp contradictionbetween water supply and demand which caused by the regional uneven development.However, the potentiality of continuing developing water resources in northwest areahas been small, and cross-regional water transfer should be considered as a large-scaleproject under the national integrated planning. Relatively speaking, sewage resourcerecovery and industrial water use structural adjustment can be used to solve the problemof water resources shortage and effectively improve the WRCC in northwest area,meanwhile, which meet the future western development and the regionalsocio-economic sustainable development objectives.By tracking a large number of study on the effect of WRCC through sewageresource recovery and industrial water use structural adjustment at home and abroad, thesystem dynamics method was maturely used in WRCC evaluation; The quantitativeanalysis was short of in study on the effect of WRCC through sewage resource recovery;The selection of industrial structure adjustment under the water resources restrictionwas focused on study on the effect of WRCC through industrial water use structuraladjustment; The study on the effect of WRCC combined these two key factors wasmuch less. Therefore, the influence degree of WRCC through sewage resource recoveryand industrial water use structural adjustment in Northwest China was quantitativeanalyzed out by using the system dynamics method, simultaneously, somecorresponding countermeasures and suggestions for improving the WRCC in Northwestwere put forward. (1) Three feedback loops of the effect of WRCC through sewage resource recoverywere analyzed by using the system dynamics method, then simulated and evaluated theinfluence degree of WRCC under the impact of sewage resource recovery in Northwest.Results showed that wastewater reuse ability remains the same Water resources in thefuture could hold the ability of population and economic scale is very weak; Whensewage resource recovery ability increased by10%, the WRCC in the future holdpopulation and economies size could be increased by20%; At the same time showedthat WRCC would be significantly improving when the sewage resource recoveryability got a moderate increase.(2) It was concluded that the optimum proportion of water of primary, secondaryand tertiary industry is0.779:0.195:0.26through the trend analysis of ten thousand yuanGDP water consumption of three industries in Northwest. The results showed thatWRCC could not only hold the present economic development scale, but also savedmaximum water quantity191.361x108m3under the optimum proportion of water;Nevertheless, either the carrying capacity of economy scale decreased, or thewater-saving effect was less than by adopting other industrial water use proportions.(3) When sewage resource recovery ability was increased by10%while industrialwater use structure adjustment was adopted0.779:0.195:0.266, the effect of WRCCthrough sewage resource recovery and industrial water use structural adjustment wouldanalyzed by using system dynamics method and through the choice of the relevantvariables and parameters, and through the design of the basic constraints. Resultsshowed that WRCC hold the population and economic scale would increased by30%in2020than under the status quo level, and every index was close to the planning target,meanwhile the increase extent of industrial added value was the largest; At same timereflected the effect of WRCC through sewage resource recovery was greater thanthrough industrial water use structural adjustment.