Abstract：The Dadu River Basin was chosen as the research area to explore the interrelationship between land use and water quality at different spatial scales. Based on the data on river water quality and land use in 2020, the basin was divided into upstream, middle and lower reaches. At six different spatial scales (100 m buffer zone, 200 m buffer zone, 500m buffer zone, 1000m buffer zone, 2000 m buffer zone, and catchment), the land use was then extracted, considering the significant landform variations in the Dadu River Basin. Various correlation analysis methods, including redundancy analysis, principal component analysis, and the Spearman correlation coefficient method, were employed to quantitatively explore the impact of land use on river water quality. The foundation for managing land use structures and ensuring the security of water resources is laid by this study. It is shown by the results that:The evaluation results of the watershed water quality based on the WQI index are all in good or higher grades, and the water quality of the middle and lower reaches of the basin is better than that of the upstream. In the upstream region of the river, a positive correlation is observed between dissolved oxygen (DO) and pH, as well as between the permanganate index (CODMn), ammonia-nitrogen (NH3-N), and total phosphorus (TP) within the buffer zone with the woodland. In the middle and downstream sections of the river, significant negative correlations are found between pH and DO with the grassland, which has a smaller area. Additionally, a weak negative correlation with TP is observed for the construction land. In conclusion, the correlation between water quality and land use types is stronger in the upstream and downstream buffer zones of the basin compared to the catchment area. Moreover, it is shown that the correlation between water quality and land use patterns is more significant in the large spatial scale buffer zone (2000 m). Therefore, for the protection of water quality within a 2000 m range on both sides of the river banks, measures should be taken to strengthen the prevention of adverse effects caused by construction land on water quality in the upstream area. Additionally, closer attention should be paid to the pollution caused by cultivated land in the middle and lower reaches.
易帆, 陈旻, 何晓枫, 游景皓, 安瑞冬. 流域土地利用分析中空间尺度对水质的影响[J]. 中国环境科学, 2023, 43(8): 4280-4291.
YI Fan, CHEN Min, HE Xiao-feng, YU Ching-hao, AN Rui-dong. Effect of spatial scale on water quality in watershed land use analysis. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(8): 4280-4291.
Shi P, Zhang Y, Li Z B, et al. Influence of land use and land cover patterns on seasonal water quality at multi-spatial scales[J]. Catena, 2017,151:182-190.
[2]
张志敏,杜景龙,陈德超,等.典型网状河网区域土地利用和景观格局对地表季节水质的影响--以江苏省溧阳市为例[J].湖泊科学, 2022,34(5):1524-1540. Zhang Z M, Du J L, Chen D C, et al. Effects of land use and landscape pattern characteristics on seasonal surface water quality in a typical reticulated river network area-a case study of Liyang City, Jiangsu Province[J]. Journal of Lake Sciences, 2022,34(5):1524-1540.
[3]
Tu J. Spatially varying relationships between land use and water quality across an urbanization gradient explored by geographically weighted regression[J]. Applied Geography, 2011,31(1):376-392.
[4]
郑一,王学军.非点源污染研究的进展与展望[J].水科学进展, 2002,(1):105-110. Zheng Y, Wang X J. Progress and prospects on non-point source pollution[J]. Advances in Water Science, 2002,(1):105-110.
[5]
束邱恺.巢湖流域不同尺度单元土地利用方式及其对河流水质的影响研究[D].南京:南京农业大学, 2016. Shu Q K. Basic research on different unit land use methods of Chaohu Water Basin and its influence on water quality[D]. Nanjing:Nanjing Agricultural University, 2016.
[6]
Karmakar S, Haque S, Hossain M M, et al. Water quality parameter as a predictor of small watershed land cover[J]. Ecological Indicators, 2019,106.
[7]
李好好,黄懿梅,郭威,等.河湟谷地不同时空尺度下土地利用及空间格局对水质的影响[J].环境科学, 2022,43(8):4042-4053. Li H H, Huang Y M, Guo W, et al. Influence of land use and land cover patterns on water quality at different spatio-temporal scales in Hehuang Valley[J]. Environmental Science, 2022,43(8):4042-4053.
[8]
吴一凡.水库流域土地利用对水质的影响研究[D].杭州:浙江大学, 2021. Wu Y F. Impact study of land use on water quality in Reservoir Basin[D]. Hangzhou:Zhejiang University, 2021.
[9]
Liu J F, Zhang X, Wu B, et al. Spatial scale and seasonal dependence of land use impacts on riverine water quality in the Huai River basin, China[J]. Environmental Science and Pollution Research, 2017, 24(26):20995-21010.
[10]
Huang J L, Li Q S, Pontius R G, et al. Detecting the Dynamic Linkage between Landscape Characteristics and Water Quality in a Subtropical Coastal Watershed, Southeast China[J]. Environmental Management, 2013,51(1):32-44.
[11]
宋静雯,张学霞,姜东旸,等.不同尺度土地利用方式对地表水环境质量的影响及驱动机制[J].环境科学, 2022,43(6):3016-3026. Song J W, Zhang X X, Jiang D Y, et al. Impact of land use types at different scales on surface water environment quality and its driving mechanism[J]. Environmental Science, 2022,43(6):3016-3026.
[12]
Sliva L, Williams D D. Buffer zone versus whole catchment approaches to studying land use impact on river water quality[J]. Water Research, 2001,35(14):3462-3472.
[13]
徐启渝,王鹏,王涛,等.土地利用结构与景观格局对鄱阳湖流域赣江水质的影响[J].湖泊科学, 2020,32(4):1008-1019. Xu Q Y, Wang P, Wang T, et al. Investigation of the impacts of land use structure and landscape pattern on water quality in the Ganjiang River, Lake Poyang Basin[J]. Journal of Lake Sciences, 2020,32(4):1008-1019.
[14]
吕永鹏.平原河网地区城市集水区非点源污染过程模拟与系统调控管理研究[D].上海:华东师范大学, 2011. Lü Y P. Process simulation and watershed management for non-point source pollution in Tidal Plain with dense river network, China[D]. Shanghai:East China Normal University, 2011.
[15]
Wang M H, Duan L J, Wang J P, et al. Determining the width of lake riparian bu ff er zones for improving water quality base on adjustment of land use structure[J]. Ecological Engineering, 2020,158.
[16]
Wu J H, Lu J. Spatial scale effects of landscape metrics on stream water quality and their seasonal changes[J]. Water Research, 2021, 191.
[17]
Mwaijengo G N, Msigwa A, Njau K N, et al. Where does land use matter most?Contrasting land use effects on river quality at different spatial scales[J]. Science of the Total Environment, 2020,715.
[18]
王鹏,齐述华,陈波.赣江流域土地利用方式对河流水质的影响[J].生态学报, 2015,35(13):4326-4337. Wang P, Qi S H, Chen B. Influence of land use on river water quality in the Ganjiang basin[J]. Acta Ecologica Sinica, 2015,35(13):4326-4337.
[19]
Johnson L B, Gage S H. Landscape approaches to the analysis of aquatic ecosystems[J]. Freshwater Biology, 1997,37(1):113-132.
[20]
Tran C P, Bode R W, Smith A J, et al. Land-use proximity as a basis for assessing stream water quality in New York State (USA)[J]. Ecological Indicators, 2010,10(3):727-733.
[21]
Guo Q H, Ma K M, Yang L, et al. Testing a Dynamic Complex Hypothesis in the Analysis of Land Use Impact on Lake Water Quality[J]. Water Resources Management, 2010,24(7):1313-1332.
[22]
Schiff R, Benoit G. Effects of impervious cover at multiple spatial scales on coastal watershed streams[J]. Journal of the American Water Resources Association, 2007,43(3):712-730.
[23]
Deng X J. Influence of water body area on water quality in the southern Jiangsu Plain, eastern China[J]. Journal of Cleaner Production, 2020,254.
[24]
King R S, Baker M E, Whigham D F, et al. Spatial considerations for linking watershed land cover to ecological indicators in streams[J]. Ecological Applications, 2005,15(1):137-153.
[25]
Ding J, Jiang Y, Liu Q, et al. Influences of the land use pattern on water quality in low-order streams of the Dongjiang River basin, China:A multi-scale analysis[J]. Science of the Total Environment, 2016,551:205-216.
[26]
Camara M, Jamil N R, Bin Abdullah A F. Impact of land uses on water quality in Malaysia:a review[J]. Ecological Processes, 2019,8.
[27]
de Mello K, Valente R A, Randhir T O, et al. Effects of land use and land cover on water quality of low-order streams in Southeastern Brazil:Watershed versus riparian zone[J]. Catena, 2018,167:130-138.
[28]
Carey R O, Migliaccio K W, Li Y C, et al. Land use disturbance indicators and water quality variability in the Biscayne Bay Watershed, Florida[J]. Ecological Indicators, 2011,11(5):1093-1104.
[29]
Zhang J, Li S Y, Dong R Z, et al. Influences of land use metrics at multi-spatial scales on seasonal water quality:A case study of river systems in the Three Gorges Reservoir Area, China[J]. Journal of Cleaner Production, 2019,206:76-85.
[30]
项颂,庞燕,窦嘉顺,等.不同时空尺度下土地利用对洱海入湖河流水质的影响[J].生态学报, 2018,38(3):876-885. Xiang S, Pang Y, Dou J S, et al. Impact of land use on the water quality of inflow river to Erhai Lake at different temporal and spatial scales[J]. Acta Ecologica Sinica, 2018,38(3):876-885.
[31]
薛联青.流域水电梯级开发环境影响成本辨识及其动态评估理论[D].南京:河海大学, 2002. Xue L Q. The environmental effect cost identification and dynamic assessment theory on hydropower cascade development of basin[D]. Nanjing:Hohai University, 2002.
[32]
高建,姚福明,雷晓辉,等.水电梯级开发背景下大渡河干流水质评价及水质分布特征研究[J].水利水电技术(中英文), 2021,52(10):133-145. Gao J, Yao F M, Lei X H, et al. Study on water quality evaluation and water quality distribution characteristics of main stream of Daduhe River under background of cascade hydropower development[J]. Water Resources and Hydropower Engineering, 2021,52(10):133-145.
[33]
成文东.大渡河流域植被变化遥感监测研究[D].成都:成都理工大学, 2019. Cheng W D. Remote sensing monitoring research of vegetation change in the Dadu River Basin[D]. Chengdu:Chengdu University of Technology, 2019.
[34]
聂超.复杂变化环境下岷沱江流域径流响应研究[D].雅安:四川农业大学, 2020. Nie C. Study on runoff response of Min-Tuo River Basin under complex changing environment[D]. Ya'an:Sichuan Agricultural University, 2020.
[35]
曹娜,毛战坡.大渡河干流水电开发中鱼类保护对策及建议[J].水利水电技术, 2017,48(1):116-121. Cao N, Mao Z P. Countermeasures and suggestions on fish protection during hydropower development of mainstream of Daduhe River[J]. Water Resources and Hydropower Engineering, 2017,48(1):116-121.
[36]
姚李.基于GIS的大渡河流域地质灾害危险性评价[D].成都:成都理工大学, 2020. Yao L. Risk assessment of geological hazards in the Dadu River Basin based on GIS[D]. Chengdu:Chengdu University of Technology, 2020.
[37]
李颖.洪泽湖水质演变趋势与驱动因素[D].重庆:西南大学, 2021. Li Y. Analysis on the trend and driving forces of water quality in Hongze Lake, Jiangsu Province[D]. Chongqing:Southwest University, 2021.
[38]
王涛,魏亚妮,钱会.权重对水质模糊综合评价的影响[J].南水北调与水利科技, 2010,8(2):87-90. Wang T, Wei Y N, Qian H. Influence of different weights on fuzzy comprehensive evaluation method for water quality[J]. South-to-North Water Transfers and Water Science & Technology, 2010,8(2):87-90.
[39]
Pesce S F, Wunderlin D A. Use of water quality indices to verify the impact of Cordoba City (Argentina) on Suquia River[J]. Water Research, 2000,34(11):2915-2926.
[40]
Hou W, Sun S H, Wang M Q, et al. Assessing water quality of five typical reservoirs in lower reaches of Yellow River, China:Using a water quality index method[J]. Ecological Indicators, 2016,61:309-316.
[41]
Wu Z S, Wang X L, Chen Y W, et al. Assessing river water quality using water quality index in Lake Taihu Basin, China[J]. Science of the Total Environment, 2018,612:914-922.
[42]
杨鑫.松花江流域吉林市段土地利用与水质变化的关系研究[D].长春:东北师范大学, 2019. Yang X. Study on the relationship between land use and water quality in Jilin section of Songhua River Basin[D]. Changchun:Northeast Normal University, 2019.
[43]
苏振民.灞河流域土地利用与河流水质响应关系研究[D].西安:长安大学, 2021. Su Z M. Relationship between land use and stream water quality in the Bahe River Basin, China[D]. Xi'an:Chang'an University, 2021.
[44]
郭羽羽,李思悦,刘睿,等.黄河流域多时空尺度土地利用与水质的关系[J].湖泊科学, 2021,33(3):737-748. Guo Y Y, Li S Y, Liu R, et al. Relationship between landscape pattern and water quality of the multi-scale effects in the Yellow River Basin[J]. Journal of Lake Sciences, 2021,33(3):737-748.
[45]
Chen H W, Lin H C, Chuang Y H, et al. Effects of environmental factors on benthic species in a coastal wetland by redundancy analysis[J]. Ocean & Coastal Management, 2019,169:37-49.
[46]
付保荣,苏杰,吴丹,等.辽河流域水环境时空差异性评价[J].水资源保护, 2011,27(6):5-8. Fu B R, Su J, Wu D, et al. Evaluation of te mporal and spatial differences of water environment in Liaohe Basin[J]. Water Resources Protection, 2011,27(6):5-8.
[47]
李好好.青海省河湟谷地土地利用结构及格局对水质的影响[D].咸阳:西北农林科技大学, 2022. Li H H. Effects of land use structure and pattern on water quality in Hehuang Valley, Qinghai Province[D]. Xianyang:Northwest A&F University, 2022.
[48]
王一舒,吴仁人,荣楠,等.西江下游流域水质与不同空间尺度土地利用的响应关系[J].水资源保护, 2021,37(4):97-104. Wang Y S, Wu R R, Rong N, et al. Response relationship between water quality in the lower reaches of Xijiang River Basin and land use at different spatial scales[J]. Water Resources Protection, 2021,37(4):97-104.
[49]
张馨月,马沛明,高千红,等.三峡大坝上下游水质时空变化特征[J].湖泊科学, 2019,31(3):633-645. Zhang X Y, Ma P M, Gao Q H, et al. Spatial-temporal variations of water quality in upstream and downstream of Three Gorges Dam[J]. Journal of Lake Sciences, 2019,31(3):633-645.
[50]
Cheng C Y, Zhang F, Shi J C, et al. What is the relationship between land use and surface water quality?A review and prospects from remote sensing perspective[J]. Environmental Science and Pollution Research, 2022,29(38):56887-56907.
[51]
赵沙.沣河流域土地利用与水质变化及其关系的研究[D].西安:陕西师范大学, 2012. Zhao S. Study on land use and water quality change in Feng River Basin[D]. Xi'an:Shaanxi Normal University, 2012.
