摘要
农村生活污水排放格局对污水收集模式及处理方式的选取具有重要影响。该研究运用GIS空间数据分析技术、最近邻点指数与实地调查等方法,从地形地貌(海拔、坡度和坡向)和点格局等角度对三峡库区龙王沟小流域的农村生活污水排放格局进行了研究。同时也对不同来源的生活污水水质特征进行了研究。结果表明:流域内生活污水全都分布在海拔300 m以下,多数位于缓坡带和斜坡带,位于西北方向略多;点格局指数R为0.33<0.5,故流域内生活污水排放呈聚集分布趋势。流域人均日产生生活污水量38.0 L,其中,厨房污水20.7 L,占54.5%;洗衣污水11.4 L,占30.0%。不同来源的农村生活污水水质差异较大。厨房污水COD和BOD5含量明显高于其它污水,而厕所污水的TP、TN、TAN较高。
The discharge pattern of rural domestic sewage has an important effect on the collection model and processing mode of sewage. This article uses the method of GIS spatial data analysis, the nearest point and field survey, to analyze the distribution pattern of the rural settlements in the terrain of the Three Gorges Reservoir Area from the landform as altitude, slope. The quality of the sewage from different sources was studied, and results showed that the sewage of the small i watershed in the study area are concentrated below the sea level of 300 m, with most residents in gentle slope belt and slope belt, and residential located in northwest is more than other positions. The nearest point R is 0.33, which is lower than 0.5, indicating the discharge pattern of rural domestic sewage has the distribution trend of aggregation. Average daily sewage discharge per capita is 38.0 L, in which 20.7 L is from the kitchen, accounting for 54.5% of the rural domestic sewage, while 11.4L from the laundry, accounting for 30.0%. The quality of rural sewage from various sources is different. COD and BOD5 of the sewage from the kitchen are much more than other sewage, while TP, TN and TAN coming from the sewage of toilet are high.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2015年第6期39-43,57,共6页
Environmental Science & Technology
基金
国家水体污染控制与治理科技重大专项(2009ZX07104-003-01)
重庆市自然科学基金(CSTC2012jj A00008
CSTC2012jj B2003)
关键词
三峡库区
农村生活污水
排放格局
污水特征
Three Gorges Reservoir Area
rural domestic sewage
emission pattern
characteristic of sewage
