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Sand rural settlements and living environment quality evaluation mode filters

Author: ZhangYiZuo
Tutor: WuBin；ZhangYuQing；WuXiuQin
School: Beijing Forestry University
Course: Complex agroforestry
Keywords: Sand Settlement Land Pattern Mode Habitat Environmental Quality Assessment
CLC: X820.2
Type: Master's thesis
Year: 2011
Downloads: 111
Quote: 0
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Abstract


Rural settlements are not only rural residents living areas , it is the location of the daily work labor is an important place for survival of the population . Sand Settlement Settlement Unlike other regions in China , the ecological environment is fragile , desertification, frequent sandstorms , living environment is very bad . Construct a reasonable settlement pattern, seeking a suitable settlement Sand Habitat model for the future construction of new countryside and sandy transformation of existing settlements is significant . This paper selects desertification serious but recent desertification control effect significant Yanchi County in northern sandy area as an example, based on 1989 , 1995 , 2000 , 2007 4 TM images and the study area in 2005 SPOT5 remote sensing images of the past 20 years sand temporal and spatial variation of settlements and villages based on sandy land surrounding settlements and villages into the spatial relationship between the type of settlement pattern extraction , through the establishment of human settlements settlement sand quality evaluation system , select a few high quality living environment settlements , combined with its settlement building process and methods to filter out a suitable area to promote settlements in the sand mode. The results showed that: ( 1 ) Salt Lake area in the Northern Suburb of settlements from 1989 to 1995 changed little from 1995 began to decline , mainly arable land, grassland , woodland mutual conversion ; ( 2 ) Sand and its surrounding land settlements the distribution pattern of use types , namely the spatial relationship between settlements and sandy , sandy area is divided into 11 kinds of settlement types , can be summarized as radial , ring, ring three basic modes radiation ; ( 3 ) through the establishment of a sandy area people living environment quality evaluation system, the three kinds of modes 11 types living environment quality evaluation , the results show that the highest quality of living environment for model B ( ring ) settlement , which went B2 ( single ring ) most settlements excellent, mode C ( ring radial ) settlements followed , the relative worst is mode A ( radial ) settlements , where A2 ( radial arable land ) is the worst. Based on the evaluation results , screening three evaluation values ??higher settlements , settlement pattern analysis of its build process , combined with the actual situation in sandy areas , raised pattern C radiation in semi-circular half of arable land settlements C3 is relatively sandy area suitable for human settlement Habitat settlement type.

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CLC: > Environmental science, safety science > Environmental Quality Assessment and Environmental Monitoring > Analysis and Evaluation of Environmental Quality > General issues > Comprehensive evaluation of the quality of the environment
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