The Computation Of Ecology Water Requirement In Liaoyang And Returning Irrigation At Shoushan Funnel Area

Along with the society's progress, population's increasing and economical development,people only pay attention to the fast development of economy and neglect the ecologicalenvironment question, so there are many questions such as degeneration of ecologicalenvironment, reducing of the biodiversity, breaking of the river course and descending ofgroundwater level. How to solve these problems, make the economy harmonious develop inthe range which the environment can stand and make people and the nature harmoniouscoexistence are the major issue at preaent. Liaoyang is in the center of Liaoning Province,which is northeast old industrial base and it is an important metallurgy and petroleumindustrial base. Excessive exploitation of the ground water creates the subsoil water level todrop and forms many underground funnels. The ground water quality is also polluted indifferent degree. Furthermore, soil erosion is one of the ecological environment questions inLiaoyang. According to the third soil erosion remote sensing report of investigation to theLiaoning Province, land corrosion area in Liaoyang has already been 13.97% of the total area.Protecting ecological environment has been no delay and researching ecology water demandin Liaoyang has great significance.This article takes hydrology water resources science, environmental science, geographyand ecology as its struction, combining hydrology characteristic of research area, makes theecological environment water demand research. The paper makes science partition of theecological environment water demand from the physical geography and the ecosystem. Theauthor thinks the ecology water demand refers in the condition of ration coming water, inorder to maintain specific structure, ecology process and the ecosystem serving function ofthe ecosystem, using water volume in the natural ecology protection and in the artificialecology construction process.The paper summarizes the concept and computing methods of the ecological environmentwater demand, and introduces good and bad points and the applicable range of the computingmethods. The ecological environment water demand is the water volume demand that issaticfying the specific region ecosystem function health. Only in the premise of making surethe ecology goal function, the ecological environment water demand can endow the concretesignificance.This article discusses ecological status, hydrology status, environment status and humangeography of the research area. Basing on the concept and connotation and theory frame ofdetermining ecological environment water, taking the region as research object, the papercarves up the ecological region and establishes ecological environment water demand model of Liaoyang. The paper disparts the ecological environment water demand of Liaoyang aslawn, woodland, river and ground water returning irrigation four parts to compute. The resultis in Liaoyang the least ecological water demand of the lawn is 226 million m~3, the leastecological water demand of the woodland is 646 million m~3, the least ecological waterdemand of the rivers is 700 million m~3 and ground water retuming irrigation volume per yearis 5 million m~3.According to the investigation of the paper, Liaoyang Shoushan groundwaterexploitation region exists 729 water wells and exploitating quantity is 315 million m~3 everyyear. Thus the quantity which can be exploited is only 275 million m~3, exceeding exploitationquantity is 40.48 million m~3 and the rate of exceeding exploitation reaches 13%. After thecomputation, river course infiltration replenishment demands about 1.865 million m~3 everyyear and the sand pit returning irrigation demands about 3.782 million m~3 every year. Plans to2010, the Shoushan funnel area altogether seals upmining well 20, reduces mining quantity0.3548 million m~3. Through returns every year fills, increase ground water military suppliesquantity 50 million m~3. Through these item of ground water protective measuresimplementation, may enable the Shoushan funnel area in 2010 to achieve the ground wateruse picks makes up the balance.