SUITABILITY EVALUATION OF CONSTRUCTION LAND IN MAIN URBAN AREA OF MUDANJIANG CITY BASED ON GIS
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摘要:
根据研究区内地质环境特征，选取地貌类型、地面坡度、地下水位埋深、地下水腐蚀性、地基承载力、土体压缩模量和地质灾害易发性7个评价指标，利用层次分析法（AHP）和GIS空间分析对主城区建设用地适宜性进行了评价分析.结果表明，牡丹江市主城区建设用地适宜性良好，适宜区和较适宜区占主城区总面积的58.2%，并以主城区南部区域地质环境最为优越，建议牡丹江市适度向南发展，同时做好生态环境和永久基本农田的保护工作.
Abstract:According to the geological environment characteristics of the study area, seven indexes are selected, including geomorphic types, surface slope, groundwater depth, groundwater corrosivity, foundation bearing capacity, soil compression modulus and geohazard susceptibility, to evaluate the suitability of construction land in the main urban area of Mudanjiang City based on analytic hierarchy process(AHP) and geographic information system (GIS) spatial analysis. The results show that the suitability of construction land in the main urban area is good, with the suitable and relatively suitable areas accounting for 58.2% of the total area, and the geological environment in the south of the main urban area is the most superior. Thus it is suggested that Mudanjiang City develop moderately to the south, and protect the ecoenvironment and permanent basic farmland.
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Key words:
- GIS /
- AHP /
- urban geology /
- suitability evaluation /
- Mudanjiang City /
- Heilongjiang Province
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表 1 牡丹江市主城区建设用地适宜性评价体系表
Table 1. Suitability evaluation indexes of construction land in main urban area of Mudanjiang City
一级指标 二级指标 分级标准 1分 3分 6分 10分 地形地貌 地貌类型 丘陵 漫滩 一级阶地 高平原 地面坡度 ≥50% 25%~50% 10%~25% ≤10% 水文地质条件 地下水位埋深/m ≤1.0 1.0~3.0 3.0~6.0 ≥6.0 地下水腐蚀性 强腐蚀 中等腐蚀 弱腐蚀 微腐蚀 工程地质条件 地基承载力/kPa ≤80 80~150 150~200 ≥200 土体压缩模量/MPa ≤4 4~7 7~10 ≥10 地质灾害 易发性分区 高易发区 中易发区 低易发区 不易发区 
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表 2 一级评价指标判断矩阵
Table 2. Judgment matrix of first-level evaluation index
地形地貌 水文地质条件 工程地质条件 地质灾害 指标值 地形地貌 1 8 6 4 λmax=4.1494 水文地质条件 1/8 1 1/3 1/5 CI=0.0498 工程地质条件 1/6 3 1 1/3 RI=0.90 地质灾害 1/4 5 3 1 CR=0.0543
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表 3 各评价指标权重表
Table 3. Weights of each evaluation index
一级评价指标 权重 二级评价指标 权重 地形地貌 0.6057 地貌类型 0.4543 地面坡度 0.1514 水文地质条件 0.0521 地下水位埋深 0.0417 地下水腐蚀性 0.0104 工程地质条件 0.1104 地基承载力 0.0883 土体压缩模量 0.0221 地质灾害 0.2318 易发性分区 0.2318
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表 4 评价单元的工程建设适宜性判定标准
Table 4. Evaluation criterion of engineering construction suitability
适宜性分级 不适宜 适宜性差 较适宜 适宜 PI 1≤PI < 3 3≤PI < 6 6≤PI < 8 8≤PI≤10
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