基于MGWR模型的新疆景观格局与防风固沙服务关系分析

doi:10.13474/j.cnki.11-2246.2025.0901

摘要/Abstract

摘要： 作为我国生态安全战略格局关键一环及“三北”工程重点建设区域,新疆独特的地理位置使其在防风固沙、遏制土地沙漠化层面极具战略意义。本文采用修正风蚀方程(RWEQ)量化防风固沙量,并结合多尺度地理加权回归(MGWR)模型,分析2000—2020年景观格局与防风固沙的时空关联。结果表明:①2000—2020年,斑块数量(NP)、平均形状指数(SHAPE＿MN)和斑块密度(PD)呈逐渐增加趋势;最大斑块指数(LPI)与凝聚度(COHESION)呈下降趋势。②2000—2020年,防风固沙量平均值增长70.73 t/km²,准噶尔盆地防风固沙量维持高值区稳定,塔里木盆地沙漠区域值偏低。③MGWR模型诊断显示,Adjusted R²位于[0.706,0.715]内,模型稳定性较好;各景观指标影响有别,NP、COHESION回归系数均值为正,其余为负。本文研究成果可为新疆景观精细化管理、防风固沙策略优化提供基础支撑,助力区域生态可持续发展。

关键词: 景观格局, 防风固沙, 多尺度地理加权回归, 时空变化, 新疆

Abstract: Xinjiang,a pivotal region in China's ecological security strategy and a key area in the “Three-North” shelter forest program,plays a vital role in windbreak and sand fixation due to its unique geography.This study uses the revised wind erosion equation (RWEQ)to quantify windbreak and sand fixation amounts and combines it with the multi-scale geographically weighted regression (MGWR)model to analyze the spatiotemporal relationship between landscape patterns and windbreak and sand fixation from 2000 to 2020.The results are as follows: ①From 2000 to 2020,the number of patches (NP),average shape index (SHAPE＿MN),and patch density (PD)showed an increasing trend,while the largest patch index (LPI)and cohesion (COHESION)exhibited a decreasing trend.②The average windbreak and sand fixation amount from 2000 to 2020 increased by 70.73 t/km².The windbreak and sand fixation amount remained stable at a high level in the Junggar basin but was relatively low in the desert areas of the Tarim basin.③The MGWR model showed good stability with an Adjusted R² ranging from 0.706 to 0.715.The regression coefficients of NP and COHESION were positive,while those of the other landscape indices were negative.This study provides a basis for refined landscape management and optimized windbreak and sand fixation strategies in Xinjiang,promoting regional ecological sustainability.

Key words: landscape pattern, windbreak and sand fixation, multiscale geographically weighted regression, spatio-temporal changes, Xinjiang

中图分类号:

P237

赵慧, 刘茜, 张敏, 李佳玉. 基于MGWR模型的新疆景观格局与防风固沙服务关系分析[J]. 测绘通报, 2025, 0(9): 1-7.

ZHAO Hui, LIU Qian, ZHANG Min, LI Jiayu. Analysis on the relationship between landscape pattern and windbreak and sand fixation services in Xinjiang based on the MGWR model[J]. Bulletin of Surveying and Mapping, 2025, 0(9): 1-7.

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