| 韩淑颖,王庆明,赵勇,翟家齐,李海红,刘宽.海河流域山丘区气候-植被物候-径流的响应关系[J].水利学报,2025,56(6):805-817 |
| 海河流域山丘区气候-植被物候-径流的响应关系 |
| The response relationship of climate-vegetation phenology-runoff in hilly area of Haihe River Basin |
| 投稿时间：2024-06-18 |
| DOI：10.13243/j.cnki.slxb.20240378 |
| 中文关键词: 植被物候 径流 气候变化 海河流域 山丘区 |
| 英文关键词: vegetation phenology runoff climate change Haihe River basin hilly area |
| 基金项目:国家杰出青年科学基金项目(52025093);国家重点研发计划项目(2021YFC3200204);河北省水利科技计划项目(2023-72) |
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| 中文摘要: |
| 植被物候提前导致流域蒸散发增加，影响了流域水文过程，尤其在径流衰减剧烈的海河山区，研究气候、植被物候和径流的耦合关系，对阐明径流衰减原因、优化生态保护措施具有重要意义。本研究以海河流域山丘区17个小流域为研究对象，基于灰色关联模型分析了1982—2020年生长季植被因子(植被物候和归一化植被指数NDVI)与气候因子对径流的相对贡献，利用结构方程模型进一步探究了春(秋)季气候-植被物候-径流的多重调控机制。结果表明：①研究区总体超87.5%的区域生长季延长，平均延长0.42 d/a。②灰色关联度结果显示：降水(0.7)和土壤湿度(0.69)是影响径流的第一和第二影响因素，其次是植被春、秋季物候(均为0.63)，其相对重要性超过气温、太阳辐射等气候因子。③春、秋季不同植被覆盖类型的小流域气候影响植被物候而调节径流的主要路径表现不一致，在春季，温度升高使春季物候提前，从而增加了蒸发而使径流减少;秋季则是降水和太阳辐射驱动物候变化而使蒸发和径流发生改变。本研究有助于认识海河流域植被与水资源演变响应的关系。 |
| 英文摘要: |
| The advance of vegetation phenology leads to an increase in evapotranspiration in the river basin，which affects the hydrological processes of the river basin，especially in the hilly area of Haihe River Basin where runoff attenuation is severe.Studying the coupling relationship between climate，vegetation phenology，and runoff is of great significance for elucidating the reasons behind runoff attenuation and optimizing ecological protection measures.This study focused on 17 small river basins in the mountainous areas of the Haihe River Basin.Based on a grey relational model，the relative contributions of vegetation factors (vegetation phenology and NDVI) and climate factors to runoff during the 1982-2020 growing season were analyzed.The structural equation model was used to further explore the multiple regulatory mechanisms of climate vegetation phenology runoff during the spring (autumn) season.The results show that：①Over 87.5% of the study area’s growth season had been extended，with an average extension of 0.42 d/a.②The grey correlation degree results show that，precipitation (0.7) and soil moisture (0.69) are the first and second influencing factors on runoff.Next is vegetation phenology in spring and autumn (both 0.63)，whose relative importance exceeds climate factors such as temperature and solar radiation.③The pathways of climate-vegetation phenology-runoff with different vegetation cover types in spring and autumn exhibited inconsistent results.In spring，warmer temperatures led to earlier spring phenology，which increased evaporation and reduced runoff.In autumn，precipitation and solar radiation drive phenological changes，resulting in changes in evaporation and runoff.The study contributes to improving the understanding of the response relationship between vegetation and water resources evolution in the Haihe River Basin under the background of climate change. |
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