التفاصيل البيبلوغرافية
| العنوان: |
INTEGRATED HEALTH ASSESSMENT OF A MULTI-TYPE RIVER TO OPTIMIZE REMEDIAL WORKS IN THE DIANCHI LAKE BASIN. |
| المؤلفون: |
Zhu-jing Jin, Jin-hua Li, Feng-le Yang, Ke Huang, Bao-xue Zhou |
| المصدر: |
Fresenius Environmental Bulletin; 2016, Vol. 25 Issue 4, p1221-1233, 13p |
| مستخلص: |
The Xinbaoxiang River is a typical multi-type river that flows through both suburban and urban areas in the Dianchi Lake Basin. In this paper, we determined the health of the river by applying a river health assessment index system to Dianchi Lake. Our results show that the comprehensive river health assessment index for the upper reach is 2.695, indicating a basically healthy status despite the low natural water supply. The middle reach is sub-healthy, with an assessment index of 2.014, because of the direct inflow of suburban wastewater directly flowing into the river with no pollutant interception and a low natural water supply. The river is also sub-healthy in its lower reach, with an assessment index of 2.376, because of the high nitrogen loading and a low capacity for selfpurification. Based on this health assessment and the characteristics of the Xinbaoxiang River, we propose the following remedies: in the upper and middle reaches, the problem of insufficient natural water supply could be solved by artificial water replenishment, in which water could be injected back into the river from the Airport Wastewater Treatment Plant and the No. 12 Wastewater Treatment Plant (which are currently under construction). In the middle reach, the sewage interception system could be enhanced in several ways to decrease the amount of pollutants flowing into the river; potential approaches include a sewage interception project along both sides of the riverbank, a dispersal treatment project utilizing the existing ponds and wetlands and a retention pond project to regulate overflow storm water with high pollutant loading. In the lower reach, the river's self-purification capacity could be increased by implementing in situ treatment projects that use ecological concrete to repair the hardened riverbed. In addition, fill biological stuffing could help increase the biomass in the river. Finally, we suggest that an estuarine wetland could be built to further decrease pollutant loading. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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