| 基于PLUS-InVEST模型的川渝地区碳储量变化及多情景预测 |
| 摘要点击 1842 全文点击 85 投稿时间:2024-12-18 修订日期:2025-02-27 |
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| 中文关键词 土地利用/覆盖变化(LUCC) 碳储量 PLUS-InVEST模型 多情景预测 川渝地区 |
| 英文关键词 land use/cover change(LUCC) carbon stock PLUS-InVEST model multi-scenario projections the Sichuan-Chongqing Region |
| DOI 10.13227/j.hjkx.202412195 |
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| 中文摘要 |
| 陆地生态系统的碳储量受土地利用/覆盖变化(LUCC)的影响显著,探讨LUCC对区域陆地生态系统碳储量的作用,对于改进土地利用结构和实现碳达峰及碳中和目标具有极其重要的意义. 研究利用2000~2020年间的土地利用数据,综合考虑了13项关键驱动因素,建立了自然发展(ND)、生态保护(EP)、经济发展(ED)和综合发展(CD)这4种发展情景. 结合PLUS和InVEST模型,模拟了川渝地区土地利用类型的动态调整与碳储量的时空演变. 结果表明:①2000~2020年,草地和耕地面积分别减少了83.65×104 hm2和46.41×104 hm2,而林地、建设用地和水域面积则分别增加了65.37×104、50.55×104和13.41×104 hm2,未利用地面积基本保持稳定. ②在2000年、2010年和2020年,碳储量分别为1 968.88×107、1 996.90×107和1 998.59×107 t,总碳储量增加了29.71×107 t,耕地和草地向林地的转变是碳储量增加的主要因素. ③相较于2020年,ND、ED、EP和CD情景下的碳储量分别增加1.48×107、27.75×107、43.62×107和50.32×107 t. 在CD情景下,碳储量及其总价值均超过其他情景,是最优的发展模式. 研究结果从土地利用的角度为生态系统碳储量优化决策提供参考,这将为未来土地利用政策的制定以及“双碳”战略目标的实现提供有力支持. |
| 英文摘要 |
| Carbon stocks in terrestrial ecosystems are significantly affected by land use/cover change (LUCC), and exploring the role of LUCC on carbon stocks of regional terrestrial ecosystems is of great importance for improving land use structure and achieving the goals of carbon peaking and carbon neutrality. Based on the land use data between 2000 and 2020, this study established four development scenarios, namely natural development (ND), ecological protection (EP), economic development (ED), and comprehensive development (CD), by integrating 13 key drivers. Combined with the PLUS and InVEST models, the dynamic adjustment of land use types and the spatial and temporal evolution of carbon stocks in the Sichuan-Chongqing Region were simulated. The study findings revealed that: ① From 2000 to 2020, the areas of grassland and cropland decreased by 83.65×104 hm2 and 46.41×104 hm2, respectively, while the areas of forest land, construction land, and water increased by 65.37×104, 50.55×104, and 13.41×104 hm2, respectively, and the area of unutilized land remained stable. ② In 2000, 2010, and 2020, the carbon stocks were 1 968.88×107, 1 996.90×107, and 1 998.59×107 t, respectively, and the total carbon stock increased by 29.71×107 t. The conversion of cropland and grassland to forest land was the primary driver for increased carbon stocks. ③ According to the study, compared to that in 2020, carbon stocks under the ND, ED, EP, and CD scenarios increased by 1.48×107, 27.75×107, 43.62×107, and 50.32×107 t, respectively. The CD scenario exhibited higher carbon stocks and a more excellent total value than the other scenarios, making it the optimal development model. The results of the study provide a reference for decision-makers on ecosystem carbon stock optimization from the perspective of land use, which will provide strong support for the formulation of future land use policies and the realization of the goal of carbon peaking and carbon neutrality. |