水利学报2025，Vol.56Issue(8)：1061-1071,11.DOI:10.13243/j.cnki.slxb.20240233
鱼类育肥场水力生境指标体系及生态流量研究——以楠溪江香鱼为例
Hydraulic index system and ecological flow of fish's fattening area:A case study of Plecoglossus altivelis in the Nanxi River
摘要
Abstract
A fish's fattening area should not only meet the dietary requirements of fish but also address the resting and shelter needs of the fish.The construction of a hydraulic ecology index system for fish fattening area is the basis for quantifying the functional characteristics of fish fattening area and deducing the suitable ecological flow for fatten-ing.This study considered the overall function of the fattening area and the spatial heterogeneity of water flow,five types of hydraulic indicators,water depth,flow velocity,Froude number,velocity gradient and kinetic energy gradi-ent were selected as the hydraulic index layer,four types of habitat patches indicators,pool,rapids,riffle and slack-water were introduced as fattening habitat patches index layer,and four types of landscape indicators,percentage of landscape,percentage of water area,shannon's diversity index,and aggregation index were selected as the patch landscape index layer.A total of 13 indicators in 3 layers,combined with their ecological significance for fish fatten-ing,were used to construct the index system of fish's fattening area.A two-dimensional hydrodynamic model was used to analyze the characteristics of the water flow in Ayu's fattening area of Nanxi River and the appropriate ecologi-cal flow for Ayu's fattening.The study results indicate that with the change of flow,the area and distribution of habi-tat patch also changed.Around the flow of 89.09 m3/s,the different types of patches are distributed in interphase,with little variation in patch area ratio,resulting in the highest Shannon's Diversity Index,which can be used as the suitable ecological flow for Ayu fattening.The results can provide a scientific basis for protecting and restoring the fish's fattening area.关键词
鱼类育肥场/栖息地斑块/指标体系/适宜生态流量Key words
fish's fattening area/habitat patches/index system/appropriate ecological flow分类
生物科学引用本文复制引用
曹平,白音包力皋,穆祥鹏,许凤冉,董志强,刘佳明..鱼类育肥场水力生境指标体系及生态流量研究——以楠溪江香鱼为例[J].水利学报,2025,56(8):1061-1071,11.基金项目
中国水科院科研专项(HY0145C122015) （HY0145C122015）
