干旱区研究2024，Vol.41Issue(11)：1831-1841,11.DOI:10.13866/j.azr.2024.11.04
梨园河流域景观格局对地表水质的影响
Impacts of landscape patterns on surface water quality in the Liyuan River Basin
摘要
Abstract
Studying the degree and mechanism of landscape pattern's influence on inland river water quality is of great significance for the water environment protection of inland river basins in arid areas.This study was based on the Liyuan River in Linze County.We studied landscape pattern data and measured water quality,using redun-dancy and correlation analyses to investigate the relationship between landscape patterns and water quality in dif-ferent buffer zones.The water bodies in the study area generally met the Class Ⅱ water quality standard,except for the average value of the chemical oxygen demand(CODCr)concentration,which fell into Class Ⅲ.Additional-ly,the average dissolved oxygen(DO),total phosphorus(TP),permanganate index(CODMn),and ammonia nitro-gen(NH3-N)concentration values met the Class Ⅱ water quality standard.The buffer zone's landscape composi-tion was dominated by arable land,and construction land was the second largest type.Analyzing the landscape in-dex revealed that the strength of human activities was not evenly distributed in the buffer zone,and the degree of human interference was the greatest in the 100 m buffer zone.The human interference degree in the 100 m buffer zone was the greatest.The proportion of cultivated land was significantly and positively correlated with DO,TP,electrical conductivity(EC),dissolved solids(TDS),and salinity,while constructed land was significantly and positively correlated with TP and NH3-N.The largest patch index(LPI)and contagion index(CONTAG)were positively correlated with the water quality indicators,whereas patch density(PD),edge density(ED),landscape shape index(LSI),and Shannon's diversity index(SHDI)were negatively correlated.Redundancy analysis indi-cated that the explanatory rate of the changes in the water quality indicators by the composition of the landscape and landscape indices was the highest in the 300 m buffer zone.The analysis indicated that the explanatory rate of landscape composition and index on water quality index changes were the highest in the 300 m buffer zone,and the 300 m buffer zone was determined to be the optimal buffer scale for landscape pattern's influence on the water quality index.Therefore,optimizing the landscape structure within the 300 m buffer zone to enhance the re-tention and adsorption capacity of pollutants can improve the water quality of the Liyuan River.关键词
相关性分析/景观格局/水质/梨园河Key words
correlation analysis/landscape pattern/water quality/Liyuan River引用本文复制引用
王昱,李能安,雒天峰,张英,袁兴鹏,田苗,信雅玲,胡飞燕..梨园河流域景观格局对地表水质的影响[J].干旱区研究,2024,41(11):1831-1841,11.基金项目
国家自然科学基金项目(52169015) （52169015）
甘肃省重点研发计划(23YFFA0020) （23YFFA0020）
甘肃省2023年水利科研与技术推广项目(23GSLK032) （23GSLK032）
