水土保持研究2025，Vol.32Issue(4)：168-175,188,9.DOI:10.13869/j.cnki.rswc.2025.04.008
黄河三角洲植被覆盖度与生态需水量研究
Study on fractional vegetation coverage and ecological water requirement in Yellow River Delta
摘要
Abstract
[Objective]This study aims to investigate the spatiotemporal dynamics and water requirements of the wetland ecosystems in the Yellow River Delta,and to clarify the response mechanism of fractional vegetation coverage to ecological water replenishment,providing a scientific basis for ecological conservation in the region.[Methods]Based on the land use data and the Normalized Difference Vegetation Index(NDVI)of the Yellow River Delta from 2000 to 2022,fractional vegetation coverage was calculated through the pixel dichotomy method.The spatiotemporal variation characteristics of fractional vegetation coverage and its response to ecological water requirements were analyzed via slope trend analysis.Ecological water requirements were estimated using the functional design method and the area quota method.[Results](1)The proportions of vegetation improvement and degradation areas in the Yellow River Delta accounted for 63.2％and 27.7％respectively,with an overall increasing trend in fractional vegetation coverage.(2)Ecological water replenishment significantly promoted the increase in fractional vegetation coverage,as evidenced by a reduction in the proportion of vegetation degradation areas and an increase in vegetation improvement areas after its implementation.(3)The annual minimum,suitable,and maximum ecological water requirements of the Yellow River Delta were calculated to be 2.91×108 m3,5.43×108 m3,and 9.11×108 m3,respectively.Outside the nature reserve,these values were 9.8×107 m3,1.82×108 m3,and 3.07×108 m3,respectively.[Conclusion]Ecological water replenishment significantly increased the fractional vegetation coverage in the Yellow River Delta,demonstrating a positive correlation between water replenishment and fractional vegetation coverage.These findings provide technical support for ecological restoration and water and sediment allocation in the Yellow River Delta.关键词
植被覆盖度/生态需水量/植被归一化指数/黄河三角洲Key words
fractional vegetation coverage(FVC)/ecological water requirement/NDVI/Yellow River Delta分类
农业科技引用本文复制引用
田芸,吉祖稳,王党伟,谢益芹..黄河三角洲植被覆盖度与生态需水量研究[J].水土保持研究,2025,32(4):168-175,188,9.基金项目
国家重点研发计划课题"黄河三角洲水沙配置模式与调控技术"(2022YFC3204303) （2022YFC3204303）
