Liu Ying, Jiang Yatao, Yang Chen
College of Water Resources, North China University of Water Resources and Electric Power, Zhengzhou, 450046, China.
Linzhou Yuneng Pumped Storage Power Co., Ltd., Linzhou, 456582, China.
Sci Rep. 2024 Oct 9;14(1):23594. doi: 10.1038/s41598-024-74435-z.
The Sanmenxia Reservoir wetland (SRW) serves as a critical ecological buffer in the middle reaches of the Yellow River. Ongoing population growth and changes in land use have placed significant pressure on the wetland's ecosystems. However, existing research has yet to establish a spatiotemporal analysis method to assess the impact of land use change on the ecosystem service value (ESV). This gap hinders the precise regulation and sustainable development of land resources. To gain a comprehensive understanding of the land use dynamics and ecological functions of the SRW, this study introduced a refined ESV evaluation method. This method revised the equivalent factors from spatial, temporal, and hydrological perspectives, with an emphasis on the impact of sediment discharge. Furthermore, the Patch-level Land Use Simulation (PLUS) model was employed to project the land use structure in 2030, and the corresponding ESV was analyzed. The study revealed the following: (1) Cropland constituted the primary land type in the SRW. Over the last two decades, the build-up area exhibited the most significant single land use dynamics, with the transformation of bare land to cropland spanning the widest range and largest area. (2) From 2000 to 2020, the ESV increased by 0.64 billion CNY, with the water body contributing almost all the increase. (3) The projected ESV for 2030 is 2.94 billion CNY, indicating an increase in ecological functions in the near future. Policy makers should recognizethe impact of land use change on ESV and implement measures to rebalance land use structure. While ensuring the preservation of cropland and the protection of lives and property, it is advisable to consider expanding the water body area to facilitate comprehensive sustainable development within SRW.
三门峡水库湿地是黄河中游重要的生态缓冲区。人口持续增长和土地利用变化给湿地生态系统带来了巨大压力。然而，现有研究尚未建立时空分析方法来评估土地利用变化对生态系统服务价值（ESV）的影响。这一差距阻碍了土地资源的精准调控和可持续发展。为全面了解三门峡水库湿地的土地利用动态和生态功能，本研究引入了一种改进的ESV评估方法。该方法从空间、时间和水文角度对当量因子进行了修正，重点考虑了输沙量的影响。此外，利用斑块尺度土地利用模拟（PLUS）模型预测了2030年的土地利用结构，并分析了相应的ESV。研究结果如下：（1）耕地是三门峡水库湿地的主要土地类型。在过去二十年中，建成区的单一土地利用动态最为显著，裸地向耕地的转变范围最广、面积最大。（2）2000年至2020年，ESV增加了6.4亿元，其中水体几乎贡献了全部增长。（3）预计2030年的ESV为29.4亿元，表明近期生态功能将有所增强。政策制定者应认识到土地利用变化对ESV的影响，并采取措施重新平衡土地利用结构。在确保保护耕地和生命财产安全的同时，建议考虑扩大水体面积，以促进三门峡水库湿地的全面可持续发展。
