四川省2001年-2011年農(nóng)業(yè)水足跡特征與動態(tài)變化研究
[Abstract]:The water resources in Sichuan Province have the characteristics of uneven distribution of time and space, and the water and drought disasters are now, and the water resources become the bottleneck of the sustainable development of the agriculture in Sichuan. Based on the theory of water footprint, this paper makes an effective connection between the physical water and the virtual water, the local water resources and the foreign water resources, and analyzes the distribution and utilization of the agricultural water resources in Sichuan Province, and provides the theoretical basis for realizing the sustainable and efficient utilization of the agricultural water resources in Sichuan. In this paper, the virtual water volume of agricultural products in Sichuan Province from 2001 to 2011 was determined by the methods of reference-field investigation, image analysis, index evaluation and grey relational analysis. On the basis of this, the virtual water volume and the consumption of the agricultural virtual water were obtained through the agricultural production. The agricultural water footprint of every city (state) in Sichuan Province from 2001 to 2011 was calculated and the dynamic changes of the agricultural water footprint in the city (state) of Sichuan Province in 2001-2011 were calculated and the dynamic changes of the agricultural virtual water trade volume were measured, and the water footprint structure and benefit were analyzed. The agricultural water footprint sustainable utilization evaluation index system is constructed in four aspects of ecological security and sustainability, and the agricultural water footprint of 21 cities (state) in Sichuan Province from 2001 to 2011 is quantitatively evaluated, and the driving factors of the agricultural water footprint in Sichuan Province are also explored. The main results are as follows: (1) The characteristics and dynamic changes of agricultural water footprint in every city (state) in Sichuan Province in the last 11 years. The characteristics of agricultural water footprint. Based on the agricultural production virtual water volume, the agricultural virtual water consumption, the agricultural virtual water trade volume and the agricultural water footprint, the characteristics of the agricultural water footprint are analyzed, and the results show that the overall agricultural water footprint in Sichuan Province in 2001-2011 has a tendency to increase. The agricultural water footprint reached its maximum in 2011, with a minimum value of 557,75-108m3, with a minimum of 452. 13-108m3. The overall agricultural water footprint per capita is increasing, and the per capita agricultural water footprint in the 11-year period is between 535. 92 m3 and 620. 64m3. The largest amount of agricultural water footprint is Chengdu, followed by Nanchong and Dazhou. The agricultural water footprint is large, which is Mianyang, Ziyang, Yibin and Luzhou. The cities (state) with small agricultural water footprint are: Aba Tibetan and Qiang Autonomous Prefecture (hereinafter referred to as Aba State), Ganzi Tibetan Autonomous Prefecture (hereinafter referred to as Ganzi Prefecture), Panzhihua City and Ya 'an City, and the agricultural water footprint in the four cities (states) in 2011 is less than 10-108m3. Study on the dynamic characteristics of the water-foot of the agricultural water in china. Based on the data of the agricultural water footprint, the dynamic characteristics of the agricultural water footprint are explored by the image analysis method. The results show that the agricultural water footprint in Sichuan province has been increasing slowly over the years, and the growth rate of Chengdu is the most obvious, especially after 2008. The increase of agricultural water footprint per capita is consistent with the trend of agricultural water footprint, and the per capita agricultural water footprint is increasing. The difference between the agricultural water footprint per capita between 2001 and 2005 (state) is not obvious. However, the gap between the per capita agricultural water resources in 2008 and 2011 has changed. (2) The evaluation and analysis of the sustainable utilization of the agricultural water footprint in the city (state) of Sichuan Province in the last 11 years. according to the theoretical basis of the agricultural water footprint, the water resource utilization evaluation index is taken as a reference, the existing indexes are improved according to the actual situation, the water footprint structure and the benefit are prepared, The evaluation index system of the agricultural water footprint of Sichuan province, which is composed of four indexes of ecological security and sustainability, can be used for the evaluation and analysis of the sustainable utilization of the agricultural water footprint in Sichuan Province. The results show that: The water-footprint structure of agricultural water in Sichuan province is characterized by the following: the dependence of agricultural water resource in the period of 11 years is between 0. 06% and 1. 28%, with a high rate of over 98%. The dependence of agricultural water resources in Sichuan Province is very small, fully self-sufficient and shows a strong sustainability characteristic. Agricultural water footprint benefit sustainability characteristics: in 2001-2011, the population density of the ten thousand tons of agricultural water in various cities (state) of Sichuan province showed a marked decline trend, the land density of the agricultural water footprint changed slowly, the total volume of the foreign trade virtual water was increased, showing the characteristics of a gradual decline in sustainability. The ecological security of agricultural water footprint in China: in 2006, 2009, 2010 and 2011, the degree of water scarcity in agriculture was high, indicating that the safety was gradually decreasing. In the area of more than 100%, there are Chengdu, Zigong, Deyang, Suining, Neijiang, Nanchong, Meishan, Yibin, Guang' an and Ziyang, among which the water scarcity of agriculture in Chengdu is the most serious, and the average annual average of 2005-2010 is over 200%. The sustainability of agricultural water footprint: the sustainable use of the agricultural water footprint is 2004, 2007 and 2008. The sustainable utilization of the agricultural water footprint is the best in Guang 'an City. In addition to the trend of sustainable utilization in 2006 and 2009, the rest of the year is sustainable. The sustainable utilization of the agricultural water footprint is the Panzhihua City, and only the trend of sustainable utilization is presented in 2005. (3) The driving force of agricultural water footprint change and the sustainable utilization strategy of water resources in Sichuan Province. Analysis of the driving force of agricultural water footprint change. By using DPS data processing platform, four kinds of factors that may affect the change of agricultural water footprint are analyzed, and the results show that: The two factors that affect the change of the agricultural water footprint in Sichuan Province are the total population of the cultivated land with the degree of correlation of 0.6433 and the total population of 0.6325. The second is the specific gravity of the paddy field and the total water storage of the reservoir and the large influence of the floating population on the agricultural water footprint in Sichuan Province. Strategic analysis of the sustainable utilization of water resources in china. In order to achieve the sustainable and efficient utilization of agricultural water resources in Sichuan Province, the sustainable utilization strategy of agricultural water resources in Sichuan Province is put forward in order to realize the sustainable and efficient utilization of agricultural water resources in Sichuan Province. First, change the water resource strategy and control the output of the virtual water moderately; secondly, optimize the agricultural industrial structure and control the scale of the high-consumption water industry; thirdly, develop the water-saving agriculture and strengthen the water resource optimization configuration; and fourthly, improve the public protection water resources and save the water resources consciousness.
【學位授予單位】:四川農(nóng)業(yè)大學
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:S27
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