Assessment of Spatial Variation in River Water Quality of the Baiyangdian Basin (China) during Environmental Water Release Period of Upstream Reservoirs
| Autor: | Quan Han, Yongliang Jin, Runze Tong, Zaifeng Tian, Wenchao Sun, He Chen, Ling Zhou, Haiyang Chen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
lcsh:Hydraulic engineering
0208 environmental biotechnology Geography Planning and Development 02 engineering and technology 010501 environmental sciences Aquatic Science 01 natural sciences Biochemistry Water scarcity Baiyangdian Lake lcsh:Water supply for domestic and industrial purposes lcsh:TC1-978 Ecosystem hydrological condition 0105 earth and related environmental sciences Water Science and Technology Hydrology Pollutant lcsh:TD201-500 Chemical oxygen demand Lake ecosystem river water quality wastewater treatment plants 020801 environmental engineering environmental water allocations longitudinal variation Environmental science Spatial variability Water quality Eutrophication |
| Zdroj: | Water Volume 12 Issue 3 Water, Vol 12, Iss 3, p 688 (2020) |
| ISSN: | 2073-4441 |
| DOI: | 10.3390/w12030688 |
| Popis: | Baiyangdian Lake, the largest freshwater body in Northern China, is facing water shortage and eutrophication problems that threaten the lake&rsquo s ecosystem. Environmental water releases from upstream reservoirs to the lake are important measures to provide the freshwater resources demanded by the lake ecosystem. However, knowledge is limited regarding the influences of such water allocations on the water quality of the upstream rivers that receive the reservoir water and transport it into Baiyangdian Lake. To improve our understanding of possible influences of environmental water releases from upstream reservoirs, the spatial variation of water quality in rivers upstream of the lake during environmental water release periods from reservoirs was explored in this study. Water samples were collected along the two routes of water allocation: the WangKuai reservoir route (WKR) and the XiDaYang reservoir route (XDYR) and water quality parameters related to organic pollutants, nitrogen and phosphorus were analyzed. In the WKR, the pollutant concentrations generally increased from upstream to downstream. Chemical oxygen demand, total nitrogen, and total phosphorous at the sampling site closest to Baiyangdian Lake could not meet the water quality target of the water function zone. For the XDYR, pollutant concentrations peaked downstream of the major urban region of Baoding city and then decreased or remained at a similar level further downstream and only the total nitrogen concentration was worse than the target. The dissimilarities in spatial variation patterns of water quality may be caused by the different spatial distribution of wastewater treatment plants in the two routes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|