1.河北农业大学 城乡建设学院, 河北 保定 071000
2.中国地质调查局水文地质环境地质调查中心, 天津 300304
杨超(1999—),女(汉族),河北省邯郸市人,硕士研究生,研究方向为生态水文过程模拟研究。Email:17531701920@163.com。
张蕾(1983—),女(汉族),河北省沧州市人,博士,副教授,主要从事流域生态水文过程模拟方面的研究。Email:463790357@qq.com。
收稿:2024-09-18,
修回:2025-01-21,
纸质出版:2025-06-10
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杨超, 张蕾, 龚磊.气候和土地利用变化对白洋淀流域土壤保持功能的影响[J].水土保持通报,2025,45(3):363-373.
Yang Chao, Zhang Lei, Gong Lei. Impacts of climate and land use change on soil conservation function in Baiyangdian basin [J]. Bulletin of Soil and Water Conservation,2025,45(3):363-373.
杨超, 张蕾, 龚磊.气候和土地利用变化对白洋淀流域土壤保持功能的影响[J].水土保持通报,2025,45(3):363-373. DOI: 10.13961/j.cnki.stbctb.2025.03.022. CSTR: 32312.14.stbctb.2025.03.022..
Yang Chao, Zhang Lei, Gong Lei. Impacts of climate and land use change on soil conservation function in Baiyangdian basin [J]. Bulletin of Soil and Water Conservation,2025,45(3):363-373. DOI: 10.13961/j.cnki.stbctb.2025.03.022. CSTR: 32312.14.stbctb.2025.03.022..
目的
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对白洋淀流域的土壤保持功能进行评估,量化气候和土地利用变化对土壤保持量变化的影响,为推进白洋淀流域生态环境保护提供科学依据。
方法
2
基于2000—2020年气象、土地利用、土壤等数据,应用InVEST模型模拟分析白洋淀流域土壤保持量的时空变化特征,并基于情景模拟与趋势分析法识别了土地利用与气候变化对土壤保持量变化的相对贡献。
结果
2
①2000—2020年白洋淀流域降水量多年平均值为445 mm,整体呈现增加趋势,流域范围内北京市和保定市东北部降水量均高于流域多年平均值。 ②2000—2020年,白洋淀流域的主要土地利用类型为耕地和林地,面积比例分别为40.16%~44.13%和24.71%~27.72%。耕地和草地面积显著减少,林地和建设用地面积显著增加,耕地主要转化为建设用地,草地主要转化为林地。 ③2000,2005,2010,2015和2020年,白洋淀流域的土壤保持强度分别为9 500,9 380,11 000,10 700和12 500 t/km
2
。年际变化整体呈波动增加趋势,空间分布上呈西北高、东南低的格局。林地和草地的土壤保持强度显著高于其他土地利用类型。 ④气候变化主导土壤保持量变化的面积比例为93.07%,土地利用变化主导土壤保持量变化的面积比例为6.93%。
结论
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白洋淀流域土壤保持量变化受气候和土地利用变化共同主导,气候变化为主要影响因素。
Objective
2
The soil conservation function of Baiyangdian basin was evaluated, and the impact of climate and land use change on soil conservation change was quantified, in order to provide scientific basis for promoting ecological environmental protection in Baiyangdian basin.
Methods
2
Based on meteorological, land use, and soil data from 2000 to 2020, the InVEST model was applied to simulate and analyze the spatiotemporal changes in soil conservation in the Baiyangdian basin. Scenario simulations and trend analysis were used to identify the relative contributions of land use and climate change to changes in soil conservation.
Results
2
① The annual average precipitation in the Baiyangdian basin was 445 mm from 2000 to 2020, with an overall increasing trend. The precipitation in Beijing City and the northeastern part of Baoding City was higher than the basin’s multi-year average. ② From 2000 to 2020, the main land use types in the Baiyangdian basin were cultivated land and forest land, accounting for 40.16%—44.13% and 24.71%—27.72% of the area, respectively. The area of cultivated land and grassland decreased significantly, while the area of forest land and construction land increased significantly. Cultivated land was mainly converted to construction land, and grassland was mainly converted to forest land. ③ In 2000, 2005, 2010, 2015 and 2020, the soil conservation intensity in the Baiyangdian basin was 9 500,9 380,11 000,10 700,12 500 t/km
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, respectively. The interannual variation showed a fluctuating increasing trend, with a spatial distribution pattern of higher intensity in the northwest and lower intensity in the southeast. The soil conservation intensity of forest land and grassland was significantly higher than that of other land use types. ④ Climate change dominated the changes in soil conservation in 93.07% of the area, while land use change dominated in 6.93% of the area.
Conclusion
2
Changes in soil conservation in Baiyangdian basin are attributed to the combination effects of climate and land use changes, with climate change being the primary factor.
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