Evaluation of the Urban Land Intensive Use and It’s Regional Differences in Shaanxi Province Based on GIS

Author(s):  
Minning Zhao ◽  
Qingyun Li ◽  
Jianmin Feng ◽  
Lingxia Chen ◽  
Huiru Li
Land ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 314
Author(s):  
Qianxi Zhang ◽  
Zehui Chen ◽  
Fei Li

Agricultural development is facing two problems: insufficient grain production and low profit of farmers. There is a contradiction between the government’s goal of increasing production and the farmer’s goal of increasing profit. Exploring the appropriate management scale of farmland under different objectives is of great significance to alleviate the conflict of interests between the government and farmers. In this study the Cobb-Douglas production function model was used to measure the appropriate management scale of farmland under different objectives in Shaanxi Province and analyze the regional differences. Under the two objectives, the appropriate management scale of the Loess Plateau was the largest in the three regions, followed by Qinba Mountains and Guanzhong Plain. Farmland area and quality were the main influencing factors for the appropriate management scale of farmland under the goal of maximizing the farmland yield, while the nonagricultural employment rate and farmland transfer rate were the main influencing factors under the goal of maximizing farmers’ profits. It is easy for Shaanxi Province to increase farmers’ profits, but more land needed to be transferred to increase farmland yield. These results suggest that in order to balance the goal of increasing yield and profit, the transfer of rural surplus labor should be promoted, and the nonagricultural employment rate should be improved. In Loess Plateau, restoring the ecological environment and enhancing the farmland quality. In Guanzhong Plain, avoiding urban land encroachment on farmland. In Qinba Mountains, developing farming techniques and moderately increasing the intensity of farmland exploit.


2013 ◽  
Vol 726-731 ◽  
pp. 4827-4830 ◽  
Author(s):  
Shao Yan Gong

On the basis of the construction of index system, by the factor analysis and the model of coupled coordination degree, the coupled coordination degrees in 2005 and 2010 between development of urban land intensive use system and social economic system are studied in 17 ground level cities of Shandong province. The first results showed that f (x) and f (y) in 2010 were higher than in 2005, which indicated that the degree of urban land intensive use and development level of the social economy were improved. The second results was that the coupled coordination degree of two systems was higher than in 2005, but if f (x) and f (y) were smaller, the gap in the capacity of comprehensive coordination was larger, the coupled coordination degrees were the smaller. So comprehensive development levels in single system were improved, which could not promote positive development between two systems.


2014 ◽  
Vol 1073-1076 ◽  
pp. 1387-1392 ◽  
Author(s):  
Ya Qun Wang ◽  
Cheng Shun Song ◽  
Zheng Xiong

With the theory and method of general system science, the paper, by taking Xianning City as a case study, established coupling coordination theoretical models of socio-economic benefits and eco-environmental benefits of urban land intensive use, then analyzed socio-economic benefits and eco-environment benefits of urban land intensive use, coupling degree and coupling coordinative degree between urban land intensive use socio-economic and eco-environmental by using the statistical data during 1999-2010. The results showed that: (1) The socio-economic benefits of urban land intensive use increased rapidly, however, the eco-environmental benefits of urban land intensive use increased in a fluctuation; (2) The coupling degrees of urban land intensive use socio-economic benefits and eco-environmental benefits was at an antagonism development stage, the coupling degrees decreased slowly; (3) The coupling coordination degree of urban land intensive use socio-economic benefits and eco-environmental benefits experienced moderate coordination level and high coordination level.


2011 ◽  
Vol 261-263 ◽  
pp. 1749-1754
Author(s):  
Yu Qi Li ◽  
Tian Quan Weng ◽  
Yi Ran Liu

This paper introduces the hazards of urban land subsidence which caused by excessive extraction of groundwater, the construction of high-rise buildings and excavation, then analyses their mechanisms. It is considered that the essence of land subsidence is due to the soil compaction caused by effective stress augment and the soil loss caused by excavation. Through further analysis of current works, we suggest that regional differences in geological conditions, building loads, repeated action of groundwater withdrawal and recharge, and meso-mechanism of soil particles should be considered when establishing land subsidence model.


2016 ◽  
Vol 40 (5) ◽  
pp. 714-731 ◽  
Author(s):  
Christopher J. Walsh ◽  
Tim D. Fletcher ◽  
Geoff J. Vietz

The geomorphic and ecological degradation of streams resulting from urbanization is well recognized. Recent reviews have hypothesized variability in ecological response to urbanization among stream types and among regions with varying climate and catchment soil and geology. Testing such hypotheses will be aided by the use of consistent metrics of the primary processes that drive urban-induced degradation of streams. We thus developed an urban typology distinguishing the common classes of urban land and water management that are hypothesized to have different effects on stream ecosystems. In developing the typology, we identify and emphasize the importance of step changes (thresholds) in the hydrologic consequences of urbanization, the often-unrecognized massive increase in drainage density of urban catchments, the difficulty in setting reference condition for many cities and the resulting difficulties in comparing responses to urbanization among cities. We critically assess the evidence for variability in responses to urbanization and its causes, and conclude that there are few studies demonstrating intra- or inter-regional differences in response to urbanization that have adequately accounted for the influence of potential differences in urban land and water management. We use the urban typology to propose metrics to allow such accounting, which we argue is necessary to advance management for stream protection and restoration.


2012 ◽  
Vol 599 ◽  
pp. 843-846
Author(s):  
Mao Sheng Yang ◽  
Hai Li Li ◽  
Jiu Zhong Wang

Based on extension theory, combined with the existing problems of urban land intensive use, evaluation system of urban land intensive use was established. According to the present situation of urban land use in Xi’an, combined with the model, this paper takes extension method to determine the index weight and makes an empirical analysis of urban land intensive use in Xi’an.


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