|
| Impact of multi-temporal and spatial landscape patterns on the water quality of the Nanfei River |
| Received:October 30, 2023 |
| View Full Text View/Add Comment Download reader |
| KeyWord:Nanfei River;basin;water quality;multiple spatial and temporal scales;landscape pattern |
| Author Name | Affiliation | E-mail | | GU Yang | School of Geography and Tourism, Anhui Normal University, Wuhu 241002, China
Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China | | | ZHANG Pingjiu | School of Geography and Tourism, Anhui Normal University, Wuhu 241002, China | changpj2006@163.com | | QIN Fengyue | Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China | | | CAI Yongjiu | Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China | | | WANG Xiaolong | Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China | wangxl@niglas.ac.cn |
|
| Hits: 1676 |
| Download times: 1384 |
| Abstract: |
| This study was conducted to analyze the influence of landscape pattern on the water quality of the Nanfei River in Hefei City. Seasonal changes in water quality and the correlation between water quality and landscape composition and landscape indices at different spatial and temporal scales were analyzed based on the land use data and water quality measurement data of the Nanfei River basin using the Mann -Whitney U-test, Spearman's correlation, and redundancy analysis. The results showed that：the overall water quality of the Nanfei River during the non-flood season was better than that during the flood season, and the water quality pollution indicators were more discrete in spatial distribution. Construction land was positively correlated with permanganate index（CODMn）, nitrate nitrogen（NO3--N）, ammonia nitrogen（NH3-N）, total nitrogen（TN）, phosphate（PO43--P）, and total phosphorus（TP）in both non-flood and flood seasons, and it was a "source landscape"; whereas the woodland and water areas were "sink landscapes". The 200 m and 300 m riparian buffer zones were the spatial scales with the highest water quality interpretation rate by the landscape pattern indices in non-flood season and flood season. Patch density（PD）, landscape shape index（LSI）, area weighted average patch fractal dimension（FRAC-AM）, perimeter-area fractal dimension（PAFRAC）, interspersion and juxtaposition index（IJI）, and the mean of Euclidean nearest-neighbor distance （ENN_MN）were the main influencing factors for water quality pollution in the Nanfei River. It was found that both landscape composition and landscape indices had a large impact on the water quality of the Nanfei River. Future management of water quality should be optimized from the source and sink landscape of connectivity, fragmentation, dominance, and diversity of the watershed. |
|
|
|
