基于OWA的大理市土地生态安全评价研究

doi:10.13249/j.cnki.sgs.2017.11.021

Abstract

Abstract:

Starting from the angle of natural ecological environment, this article selects 16 indicators to establish the land ecological security evaluation system in Dali City from three aspects of natural factors, environmental factors, landscape factors, and uses the MCE module of IDRISI software of OWA multi criteria decision making evaluation of Dali land ecological security evaluation results of different decision under risk coefficient. The results showed that the different risk attitudes of decision makers, difference of land ecological security evaluation results. In practical application, the study area must be combined with the actual situation as well as planning to select different risk coefficient evaluation, to get a more realistic and effective results. As a whole, the land ecological security in Dali City is getting better and better as the decision risk factor increases.

Key words: OWA, multi criteria decision making, land ecological security, Dali City

CLC Number:

F301.24

Hong Zhang, Anqi Wang, Beiyang Song. Evaluation of Land Ecological Security in Dali City Based on OWA[J].SCIENTIA GEOGRAPHICA SINICA, 2017, 37(11): 1778-1784.

Figures/Tables 5

Table 1

Table 2

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References 15

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目标层（A）	要素层(B)	要素层权重	指标层(C)	准则权重
大理市土地生态安全评价（A）	自然因子（B₁）	0.4	水土流失敏感度（C₁）	0.1128
			坡向（C₂）	0.0226
			地形起伏度（C₃）	0.0342
			地质灾害易发性（C₄）	0.1291
			土壤保持重要程度（C₅）	0.0460
			植被覆盖度（C₆）	0.0553
	生态环境因子（B₂）	0.4	生物丰度指数（C₇）	0.0229
			生物多样性保护（C₈）	0.0757
			生态环境弹性度（C₉）	0.0408
			生态系统服务价值（C₁₀）	0.0347
			25°以上耕地面积比重（C₁₁）	0.1167
			水面用地比重（C₁₂）	0.1091
	景观因子（B₃)	0.2	景观多样性指数（C₁₃）	0.0243
			景观均匀度指数（C₁₄）	0.0380
			景观蔓延度指数（C₁₅）	0.0841
			景观分离度指数（C₁₆）	0.0537

决策风险系数		α→0（0.0001）	α=0.1	α=0.5	α=1	α=2	α=10	α→∞（1000）
OWA次序权重	V₁	1	0.8073	0.3430	0.0625	0.0138	0.0000	0
	V₂	0	0.0552	0.1344	0.0625	0.0381	0.0000	0
	V₃	0	0.0328	0.0978	0.0625	0.0575	0.0000	0
	V₄	0	0.0230	0.0778	0.0625	0.0724	0.0002	0
	V₅	0	0.0174	0.0644	0.0625	0.0830	0.0011	0
	V₆	0	0.0138	0.0543	0.0625	0.0898	0.0043	0
	V₇	0	0.0111	0.0463	0.0625	0.0930	0.0124	0
	V₈	0	0.0091	0.0395	0.0625	0.0929	0.0282	0
	V₉	0	0.0075	0.0336	0.0625	0.0900	0.0535	0
	V₁₀	0	0.0062	0.0284	0.0625	0.0844	0.0872	0
	V₁₁	0	0.0050	0.0237	0.0625	0.0766	0.1239	0
	V₁₂	0	0.0040	0.0193	0.0625	0.0668	0.1551	0
	V₁₃	0	0.0031	0.0152	0.0625	0.0554	0.1709	0
	V₁₄	0	0.0023	0.0112	0.0625	0.0427	0.1632	0
	V₁₅	0	0.0015	0.0074	0.0625	0.0290	0.1288	0
	V₁₆	0	0.0007	0.0037	0.0625	0.0147	0.0711	1
对应方法		OWA(布尔AND)	OWA	OWA	OWA(WLC)	OWA	OWA	OWA(布尔OR)
风险态度		最悲观,避险	悲观	比较悲观	无偏好,中等风险	比较乐观	乐观	最乐观,冒险

Evaluation of Land Ecological Security in Dali City Based on OWA

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