| Yulin city is located in the hinterland of the energy golden triangle, that is the contiguous areas on Shanxi, Shaanxi province and the Inner Mongolian autonomous region, the mineral resources here are extremely abundant, there are 6t coal, 100m~3 natural gas, 140t salt in each square meter, therefore it was praised as" Kuwait of China". Yulin city is an important strategic reserve base of energy. However, Yulin is situated at the ecotone between agriculture and animal husbandry in north china, it's soil and water loss and land desertification are very seriously, all the 1 area 11 counties are the key areas of the soil and water conservation throughout our country. The resources non-reproducibility, water resource scarcity, the extreme vulnerability of area ecological environment, and the extensive exploration caused the great loss of regional ecology, economic and society. Therefore, take Yulin as the typical area, by combining with the actual situation, to carry out the research on the influence between energy exploration and the region ecological environment, energy exploration and the economic society development as well as water resource has the extremely very important theory and practical meaning.The paper obeys the "science development view" and "five overall plans", which were put forward in the third plenary session of the sixteenth central committee, and basic mentality of eleventh five-year plan to strengthen three pillar industry, and the four base, such as North Shaanxi energy chemical industry base. By utilizing mathematical statistic method, synthesis weighing method, residence investigation method, analytic hierarchy process, as well as wavelet methods to exhaustively studied the ecological environment questions, which were caused by the extensive exploration, it's influence on regional water resources and industrial harmony development, and the questions about the interaction between energy exploitation and social economy development of Yulin city. Take the optimal exploitation of energy as the goal, striving to have the innovation in the theory and the practical two aspects, through careful research. The paper had obtained the following the research results:(1) During 1974～2004 years period, the warming and drying trend climate tendency is obvious in Yulin city. The linear tendency value increases of annual mean temperature is 0.0438℃/a, obviously, it is higher than national average warming rate 0.004℃/a, also is higher than global average warming rate 0.006℃/a; The annual mean precipitation tends to reduce in the fierce undulation change, the linear tendency value which the precipitation reduces is 0.678mm/a. Overall, in Yulin city, the increasing scope in the climatic warming is obviously higher than the national leve -1, but the corresponding scope in drought does not have the same extent.(2) With the scale expansion in energy exploitation, the vulnerable degrees of Yulin city increased. Compared with 1985, the vulnerable degrees of Yulin city present the enhancement tendency in 2004. The number of the most vulnerable countries increase fromlin 1985 to 4 in 2004, while the number of mild vulnerable countries decrease from 3 in 1985 to 2 in 2004. The whole vulnerable degrees of Yulin city increase from 0.459 in 1985 to 0.532 in 2004; in the north sand and grass region, which energy exploitation is more concentrated than the south region, the vulnerable degrees increase from0.438 in 1985 to 0.535 in 2004; in loess hilly-gully region, the vulnerable degrees increase from 0.481 in 1985 to 0.53 in 2004.(3) In the north sand and grass region, which energy exploitation is more concent-rated than the south region, the correlation between development indexes of country ec -onomy and the vulnerable degrees are negative. In 2004, as far as the level of econo -my development is concerned, Yuyang district, Shenmu country, Jingbian country are top three countries, however, the vulnerable degrees of those countries t are top three as well. Obviously, the large-scale energy exploitation accelerate the economy development, at the same time, destructed the regional eco-environment badly.(4) Yulin city facing severe shortage in water resource, unifying the region industri -al structure adjustment, the Grain crops sown area should be reduced. During 1999～2005 period, the mean irrigation percentage is 82.83%, but mean irrigation coef -ficient value is 0.4 in whole Yulin city, all those data tell that the quantity of agricultu -ral water use is huge, but it's efficiency is low. Therefore, it is necessary to take the advantage of the agriculture industrial structure adjustment and the promotion in Yulin city, at the same time, reducing the Grain crops sown area, developing the fruit industr -y economy moderately, developing the saving water and drought-resistant miscellany -eous grains agriculture and the grass industry positively.(5) The Kuye river actual amount of runoff evolution has certain phases. The wavelet analysis result of the Kuye River indicated that it's multi-annual mean amount of runoff change division is three stages, the first stage is: 1950～1982 period, the second stage is: 1983～1999 period, and the third stage started in 2000. In three different stage, the average amount of Kuye River runoff respectively is 71,800 cubic meter, 48,300 cubic meters 19,300 cubic meters, three stage Kuye River amount of runoff tends to reduce.(6) The artificial activity that affects the Kuye river amount of runoff reduces flows the function is obvious. The runoff restoration result of the Kuye River showed that, the extensive energy exploitation and the scale expand in Kuye River basin reduced the runoff amount clearly. During 1974～1985, the mean artificial influence value is-11.32%, while ,during 1986～2004, this value is 8.95%; During 1974～1985, the runoff amount is 62,820 m~3, during 1986～2004, the runoff amount reduces to 39,370m~3.(7) The artificial activity, especially, the extensive energy exploitation and the scale expanding are the main reasons which reduced the amount of river runoff. The results of wavelet analysis and river runoff restoration indicated that, The abrupt change time of Kuye River occurred in 1982 and 1998 respectively, while the abrupt change time of the annual mean temperature and annual mean precipitation of Kuye River basin occurred in 1991. This difference proved this conclusion.(8) Combing the actual situation of regional energy exploitation, the series research, and the appraisal result of sustainable development based on AHP, the author constructed the optimal control pattern---Yulin pattern, in order to provide the corresponding reference to rational resource exploitation in Yulin city and other resource-based city.This research striving to have the innovation in following several aspects:(1) From theories, through discussing the water resource shortage during energy exploitation under vulnerable background, combing the actual situation of Yulin city, the paper has constructed the optimal control pattern---Yulin pattern, which is suitable to the regions with abundant resources, meanwhile, it's ecological environment is vulnerable wondrously, in order to provide the reference for the optimal exploitation.(2) From the technical means, though adopting restoration of the natural runoff amount of Kuye River and wavelet analysis method confirmed that the extensive energy exploitation and the scale expanding are the main reasons which reduced the amount of river runoff in Kuye River basin. The results of wavelet analysis and river runoff restoration indicated that, The abrupt change time of Kuye River occurred in 1982 and 1998 respectively, while the abrupt change time of the annual mean temperature and annual mean precipitation of Kuye River basin occurred in 1991. This difference proved this conclusion.(3) From the content, comparative analysis of assessments of eco-environmental vulnerabilities and county economy development shows that the correlation between development index of county economy and the vulnerable degrees are negative. In 2004, as far as the level of economy development is concerned, Yuyang district, Shenmu country, Jingbian country are top three countries, however, the vulnerable degrees of those countries t are top three as well. Obviously, the large-scale energy exploitation accelerate the economy development, at the same time, destructed the regional eco-environment badly.(4) Moreover, from the content, the Grain crops sown area should be reduced, to enhance the agricultural water-using efficiency. During 1999～2005 period, the mean irrigation percentage is 82.83%, but mean irrigation coefficient value is 0.4 in whole Yulin city, all those data tell that the quantity of agricultural water use is huge, but it's efficiency is low. Therefore, it is necessary to take the advantage of the agriculture industrial structure adjustment and the promotion in Yulin city, at the same time, reducing the Grain crops sown area, developing the fruit industry economy moderately, developing the saving water and drought-resistant miscellaneous grains agriculture and the grass industry positively.Vulnerable eco-regions Energy exploitation Water resource scarcity Optimal control Yulin cityThis research is subsidized by the following project:Country key basic research plan (project authorization number: 2006CB400505), Ministry of Education philosophy social sciences research important issue attack project "west economical development and ecological environment reconstruction research" (project authorization number: 04JZD00010), the Ministry of Education Humanities Social sciences Key Research Base significant research project "The research on getting rid of poverty from ecology in ShaanGanNingxia Revolutionary Region" (the project authorization number: 05JJD770013)...
|
PDF Full Text Request