| 引用本文: | 杨洁,许有鹏,高斌,王跃峰,徐羽,马倩.城镇化下河流水质变化及其与景观格局关系分析——以太湖流域苏州市为例.湖泊科学,2017,29(4):827-835. DOI:10.18307/2017.0406 |
| YANG Jie,XU Youpeng,GAO Bin,WANG Yuefeng,XU Yu,MA Qian.River water quality change and its relationship with landscape pattern under the urbanization: A case study of Suzhou City in Taihu Basin. J. Lake Sci.2017,29(4):827-835. DOI:10.18307/2017.0406 |
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| 摘要: |
| 以河流近域景观格局与水环境质量间的关系为研究对象，基于2001年及2010年两期土地利用类型以及7条典型河流的溶解氧、氨氮、高锰酸盐指数、总磷、总氮5项水质指标，分析城镇化下苏州市河流水质与景观格局之间的关系及其变化规律. 结果表明：（1）苏州市河流水质状况总体较差，但呈现一定的好转趋势. （2）河流水质受到城镇用地、旱地及水田的综合影响，并表现出尺度效应. 其中城镇用地与旱地对河流水质恶化具有明显的作用，水田则反之. 2001-2010年城镇用地及水田对水质的影响程度有所减弱，旱地则增强. （3）蔓延度指数、最大面积斑块比例对河流水质呈现负相关，斑块数量、斑块密度、香农均匀度指数、香农多样性指数则与水质呈现正相关. 景观格局对于水质的影响在大范围缓冲区更为显著. 研究结果可为苏州水环境管理及太湖流域城市空间开发提供一定的参考依据. |
| 关键词: 水质变化 土地利用 景观空间特征 城镇化 苏州市 太湖流域 |
| DOI：10.18307/2017.0406 |
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| 基金项目:国家重点研发计划专项（2016YFC0401502）、国家自然科学基金项目（41371046，41401035）、江苏水利科技基金项目（2015003）和水利部水利公益专项（201201072，201501041）联合资助. |
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| River water quality change and its relationship with landscape pattern under the urbanization: A case study of Suzhou City in Taihu Basin |
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YANG Jie1, XU Youpeng1, GAO Bin1, WANG Yuefeng1, XU Yu1, MA Qian2
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1.School of Geographic and Oceanographic Sciences Institute, Nanjing University, Nanjing 210023, P.R.China;2.Jiangsu Province Hydrology and Water Resources Investigation Bureau, Nanjing 210008, P.R.China
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| Abstract: |
| Based on land use data and water quality data of seven typical rivers of 2001 and 2010, the relationship between landscape pattern and water quality indicators and its change characteristics in Suzhou City under the urbanization were analyzed. The monitoring data was consisted of five water quality indicators including dissolved oxygen, ammonia, potassium permanganate index, total phosphorus and total nitrogen. The results were listed as follows. The water quality of Suzhou City was general poor, although showed a trend of improvement. River water quality suffered the comprehensive influence of urban land, dry land and paddy field in research area. The influence varies among scales. Meanwhile, urban land and the dry land had obvious effect on the deterioration of river water quality.The correlation between urban land area and paddy field area and water quality indexes abated in small scales in 2001-2010. However, the impact of dry land on water quality was greatly increased. What's more, water quality was negatively correlated to contagion index and the largest patch index and positively correlated to number of patches, patch density, Shannon's evenness index and Shannon's diversity index. The effects of landscape pattern in a wide range of buffer on water quality was more significant. The research results provided certain reference basis to Suzhou water environment management and urban space development of the Taihu Basin. |
| Key words: Water quality change land use landscape spatial characteristics urbanization Suzhou City Taihu Basin |
