| Land is the basis for human survival and development.With the continuous development of China's economy and society,the scarcity of land resources in some areas has become increasingly prominent.The competition of state-owned land market is fierce.With the advancement of urbanization in China,the land ecology in rural areas is affected to some extent.In this paper,the integrated use of GIS spatial analysis,supplemented by field investigation and remote sensing information technology method,combining with the xinzheng present situation of land use,topography,environmental quality and economic and social data,based on multi-factor comprehensive evaluation method,to xinzheng rural areas building covers the land ecological basic index and structural index,stress indicators and efficiency indicators of comprehensive evaluation index system,completed in 2011 and 2017 two issue of the evaluation of land ecological status.The main research contents and conclusions are as follows:(1)by consulting literatures and experts and combining existing research results,a total of 21 indicators were constructed in the four criteria layer of land ecological foundation,ecological structure,ecological stress and ecological benefit.The basic index layer of land ecology reflects the background conditions of natural attributes such as climate,soil,site and vegetation in the study area.Structural indicators reflect the diversity of landscape and the proportion of different land use/cover types in the study area;The stress index reflects the proportion of soil pollution,land damage and degradation in the study area.The efficiency index reflects the ecological benefit and ecological value of the research area.(2)the ecological condition of the xinzheng comprehensive evaluation result,In 2017,the number of villages in the rural area of xinzheng city was 121,accounting for 43.45%of the evaluated area.The villages were mainly distributed in the southwest and east of xinzheng city.The highest score was 0.71 in zhouwan village,xindian town.The number of second-level villages is 99,accounting for 34.44%of the evaluation area,distributed in all towns and villages in xinzheng city.Number for 59 in three levels of village,the area accounted for 22.11%of evaluation area,mainly distributed in the northern suburbs of xinzheng and,which assess the look of the lowest score is 0.45,the main impact factors of the level of village of vegetation coverage,the regional environmental quality index,slope,reflects the level of village land development intensity is bigger,the vegetation coverage area is lesser.(3)the study on the dynamic change of land ecological status shows that the overall land ecological status in xinzheng city is mainly stable.The villages with better land ecological conditions accounted for 12.91%of the total evaluation area,the villages with balanced land ecological conditions accounted for 72.46%,and the villages with worse land ecological conditions accounted for 14.45%.In terms of the distribution of dynamic changes in land ecological conditions,the land ecological conditions of villages in the south and east of xinzheng show a trend of getting better,and the villages that get worse are more concentrated,mainly distributed in longhu town,mengzhuang town and xuedan town with rapid economic development and urbanization,as well as the villages around xinzheng city.(4)the driving force analysis showed that the alpha 0.01 significance level,per capita income,level of industrialization,the urbanization level and the results of the evaluation of land ecological status of Spearman correlation coefficient respectively 0.266,0.517,0.636,land ecological condition and per capita income,level of industrialization,the negative correlation between the level of urbanization,the urbanization level the highest impact on land ecological condition. |
PDF Full Text Request