scholarly journals Spatio-Temporal Variation and Controlling Factors of Water Quality in Yongding River Replenished by Reclaimed Water in Beijing, North China

Water ◽  
2017 ◽  
Vol 9 (7) ◽  
pp. 453 ◽  
Author(s):  
Yilei Yu ◽  
Muyuan Ma ◽  
Fandong Zheng ◽  
Licai Liu ◽  
Nana Zhao ◽  
...  
Keyword(s):  
Water Quality ◽  
Temporal Variation ◽  
North China ◽  
Reclaimed Water ◽  
Controlling Factors ◽  
Spatio Temporal ◽  
Yongding River

scholarly journals Assessment of Water Quality Using Chemometrics and Multivariate Statistics: A Case Study in Chaobai River Replenished by Reclaimed Water, North China

Water ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2551
Author(s):  
Yilei Yu ◽  
Xianfang Song ◽  
Yinghua Zhang ◽  
Fandong Zheng
Keyword(s):  
Water Quality ◽  
Stable Isotope ◽  
Temporal Variation ◽  
River Water ◽  
Water Reuse ◽  
North China ◽  
Reclaimed Water ◽  
Spatial And Temporal Variation ◽  
Water Quality Criteria ◽  
Rock Interaction

Dry rivers could be effectively recovered by reclaimed water in North China, while river water quality would be an important issue. Therefore, it is important to understand the spatiotemporal variation and controlling factors of river water. Water samples were collected during March, May, July, September, and November in the year 2010, then 20 parameters were analyzed. The water environment was oxidizing and alkaline, which was beneficial for nitrification. Nitrate was the main nitrogen form. Depleted and enriched isotopes were found in reclaimed water and river water, respectively. Total nitrogen (TN) and total phosphorus (TP) of reclaimed water exceed the threshold of reclaimed water reuse standard and Class V in the surface water quality criteria. Most river water was at the severe eutrophication level. The sodium adsorption ratio indicated a medium harmful level for irrigation purpose. Significant spatial and temporal variation was explored by cluster analysis. Five months and nine stations were both classified into two distinct clusters. It was found that 6 parameters (chloride: Cl−, sulphate: SO42−, potassium: K+, sodium: Na+, magnesium: Mg2+, and total dissolved solids: TDS) had significant upward temporal variation, and 12 parameters (dissolved oxygen: DO, electric conductivity: EC, bicarbonate: HCO3−, K+, Na+, Ca2+, TDS, nitrite-nitrogen: NO2-N, nitrate nitrogen: NO3-N, TN, TP, and chlorophyll a: Chl.a) and 4 parameters (Mg2+, ammonia nitrogen: NH3-N, and the oxygen-18 and hydron-2 stable isotope: δ18O and δ2H) had a significant downward and upward spatial trend, respectively. The Gibbs plot showed that river water chemistry was mainly controlled by a water–rock interaction. The ionic relationship and principal component analysis showed that river water had undergone the dissolution of carbonate, calcite, and silicate minerals, cation exchange, a process of nitrification, photosynthesis of phytoplankton, and stable isotope enrichment. In addition, gypsum and salt rock have a potential dissolution process.

Water quality of reclaimed water from treated urban wastewater in Chaobai River Basin, North China

2014 ◽  
Vol 12 (2) ◽  
pp. 103-109 ◽  
Author(s):  
Yilei Yu ◽  
Xianfang Song ◽  
Yinghua Zhang ◽  
Fandong Zheng ◽  
Licai Liu
Keyword(s):  
Water Quality ◽  
River Basin ◽  
North China ◽  
Reclaimed Water ◽  
Urban Wastewater

Spatio temporal variation in octocoral assemblages along a water quality gradient in the northwestern region of Cuba

2020 ◽  
Vol 153 ◽  
pp. 110981 ◽  
Author(s):  
Néstor Rey-Villiers ◽  
Alberto Sánchez ◽  
Hansel Caballero-Aragón ◽  
Patricia González-Díaz
Keyword(s):  
Water Quality ◽  
Temporal Variation ◽  
Northwestern Region ◽  
Spatio Temporal

Spatio-temporal variation of potential evapotranspiration and climatic drivers in the Jing-Jin-Ji region, North China

2018 ◽  
Vol 256-257 ◽  
pp. 75-83 ◽  
Author(s):  
Jingyan Han ◽  
Jianhua Wang ◽  
Yong Zhao ◽  
Qingming Wang ◽  
Bing Zhang ◽  
...  
Keyword(s):  
Temporal Variation ◽  
North China ◽  
Potential Evapotranspiration ◽  
Climatic Drivers ◽  
Spatio Temporal

scholarly journals SPATIO-TEMPORAL VARIATION OF WATER QUALITY ON A TIDAL FLAT

2001 ◽  
Vol 45 ◽  
pp. 1039-1044
Author(s):  
Masashi KODAMA ◽  
Nobuhiro MATSUNAGA ◽  
Kentaro MIZUTA ◽  
Takahisa TOKUNAGA
Keyword(s):  
Water Quality ◽  
Temporal Variation ◽  
Tidal Flat ◽  
Spatio Temporal
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