| 基于景观格局的渭河流域甘肃段生态风险评价 |
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| 引用本文： | 陈慧敏,周冬梅,张军,陈思瑾,李嫚斐,王祖玉.基于景观格局的渭河流域甘肃段生态风险评价[J].农业工程,2022,12(11):72-79. |
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| 作者姓名： | 陈慧敏 周冬梅 张军 陈思瑾 李嫚斐 王祖玉 |
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| 作者单位： | 1.甘肃农业大学资源与环境学院，甘肃 兰州 730070 |
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| 基金项目： | 甘肃省高等学校创新基金(2021A-061);甘肃农业大学学科建设基金(GAU-XKJS-2018-203);甘肃农业大学青年导师扶持基金(GAU-QDFC-2018-17)；黄河渭河流域(甘肃段)生态环境评估(701-03720015) |
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| 摘 要： | 为揭示渭河流域甘肃段近16年来景观对生态风险的影响，以2005、2010、2015和2020年4期TM遥感影像为数据源，构建景观生态风险评价模型，开展渭河流域景观生态风险评价及其时空分异研究。结果表明:2005—2020年，研究区景观类型发生了较大变化，人为因素对景观类型的干扰较大；2005－2020年，各渭河流域甘肃段景观破碎度、分离度及干扰度除建设用地外均呈现增长趋势，景观分维数除建设用地外均呈现减少趋势；2005－2020年，渭河流域甘肃段景观生态风险空间分布呈现显著正相关性；渭河流域甘肃段以理想和良好生态风险区为主，占流域面积62%以上，较差生态风险区主要分布在定西市安定区。从整体来看，研究区生态风险呈现出稳定的趋势。
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| 关 键 词： | 渭河流域 景观生态风险 空间自相关分析 |
| 收稿时间： | 2022/2/23 0:00:00 |
| 修稿时间： | 2022/3/26 0:00:00 |
Ecological risk assessment of Gansu section of Weihe River Basin Based on landscape pattern |
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| CHEN Huimin,ZHOU Dongmei,ZHANG Jun,CHEN Sijin,LI Manfei and WANG Zuyu.Ecological risk assessment of Gansu section of Weihe River Basin Based on landscape pattern[J].Agricultural Engineering,2022,12(11):72-79. |
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| Authors: | CHEN Huimin ZHOU Dongmei ZHANG Jun CHEN Sijin LI Manfei and WANG Zuyu |
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| Affiliation: | 1.College of Resources and Environmental Sciences，Gansu Agricultural University，Lanzhou Gansu 730070，China2.College of Life Science and Technology，Gansu Agricultural University，Lanzhou Gansu 730070，China |
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| Abstract: | In order to reveal the impact of landscape on ecological risk in Gansu section of Weihe River Basin in recent 16 years, taking four TM remote sensing images in 2005, 2010, 2015 and 2020 as data sources, this paper constructs a landscape ecological risk assessment model and carries out the research on landscape ecological risk assessment and its temporal and spatial differentiation in Weihe River Basin. The results show that: (1) From 2005 to 2020, the landscape types in the study area have changed greatly, and human factors have a great interference on the landscape types; (2) From 2005 to 2020, the landscape fragmentation, separation and interference in Gansu section of Weihe River Basin showed an increasing trend except for construction land, and the landscape fractal dimension showed a decreasing trend except for construction land; (3) From 2005 to 2020, the spatial distribution of landscape ecological risk in Gansu section of Weihe River Basin showed a significant positive correlation; (4) The Gansu section of Weihe River Basin is dominated by ideal and good ecological risk areas, accounting for more than 62% of the basin area. The poor ecological risk areas are mainly distributed in Anding District of Dingxi City. On the whole, the ecological risk in the study area shows a stable trend. |
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| Keywords: | Gansu section of Weihe River Basin Landscape ecological risk Spatial autocorrelation analysis |
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