EFFECTS OF RECLAIMED WATER INFILTRATION ON AQUIFERS IN CHAOBAI RIVER AREA, BEIJING,CHINA

2017 ◽  
Author(s):  
Binghua Li ◽  
Keyword(s):  
Reclaimed Water ◽  
Water Infiltration ◽  
Beijing China

scholarly journals Impact of reclaimed water irrigation on antibiotic resistance in public parks, Beijing, China

2014 ◽  
Vol 184 ◽  
pp. 247-253 ◽  
Author(s):  
Feng-Hua Wang ◽  
Min Qiao ◽  
Zhen-E Lv ◽  
Guang-Xia Guo ◽  
Yan Jia ◽  
...  
Keyword(s):  
Antibiotic Resistance ◽  
Reclaimed Water ◽  
Public Parks ◽  
Beijing China ◽  
Reclaimed Water Irrigation

scholarly journals Hydrogeophysical Assessment of the Critical Zone below a Golf Course Irrigated with Reclaimed Water close to Volcanic Caldera

Water ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2400
Author(s):  
Alex Sendrós ◽  
Mahjoub Himi ◽  
Esmeralda Estévez ◽  
Raúl Lovera ◽  
M. Pino Palacios-Diaz ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Hydraulic Properties ◽  
Electrical Resistivity Tomography ◽  
Reclaimed Water ◽  
Geophysical Methods ◽  
Water Infiltration ◽  
Golf Course ◽  
Pyroclastic Deposits ◽  
Undisturbed Soil ◽  
Resistivity Tomography

The geometry and the hydraulic properties of the unsaturated zone is often difficult to evaluate from traditional soil sampling techniques. Soil samples typically provide only data of the upper layers and boreholes are expensive and only provide spotted information. Non-destructive geophysical methods and among them, electrical resistivity tomography can be applied in complex geological environments such as volcanic areas, where lavas and unconsolidated pyroclastic deposits dominate. They have a wide variability of hydraulic properties due to textural characteristics and modification processes suh as compaction, fracturation and weathering. To characterize the subsurface geology below the golf course of Bandama (Gran Canaria) a detailed electrical resistivity tomography survey has been conducted. This technique allowed us to define the geometry of the geological formations because of their high electrical resistivity contrasts. Subsequently, undisturbed soil and pyroclastic deposits samples were taken in representative outcrops for quantifying the hydraulic conductivity in the laboratory where the parametric electrical resistivity was measured in the field. A statistical correlation between the two variables has been obtained and a 3D model transit time of water infiltration through the vadose zone has been built to assess the vulnerability of the aquifers located below the golf course irrigated with reclaimed water.

scholarly journals Variations of Groundwater Dynamics in Alluvial Aquifers with Reclaimed Water Restoring the Overlying River, Beijing, China

Water ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 806
Author(s):  
Zekang He ◽  
Dongmei Han ◽  
Xianfang Song ◽  
Lihu Yang ◽  
Yinghua Zhang ◽  
...  
Keyword(s):  
Seasonal Variations ◽  
Preferential Flow ◽  
Reclaimed Water ◽  
Northern China ◽  
Flow Path ◽  
Multivariate Statistical ◽  
River Bank ◽  
Groundwater Levels ◽  
Groundwater Dynamics ◽  
Beijing China

Some of the rivers in northern China are dried, and reclaimed water (RW) is used to restore these degraded river ecosystems, during which the RW could recharge the aquifer by river bank infiltration. From 2007 to 2018, 2.78 × 108 m3 of RW has been replenished to the dried Chaobai River (Shunyi reach), Beijing, China, which is located on the edge of one depression cone in groundwater caused by groundwater over-pumping. The groundwater hydrodynamic variations and the flow path of the RW were identified by eight-year hydrological, hydrochemical, and stable isotopic data, together with multivariate statistical analysis. The RW infiltration drastically impacts the groundwater dynamics with a spatiotemporal variation. The 30-m depth groundwater levels at Perennial intake reach increased quickly around 3 m after 2007, which indicated that they were dominated by RW infiltration. Other 30-m depth groundwater levels were controlled by precipitation recharge from 2007 to 2011, showing significant seasonal variations. In 2012, with more RW transferred to the river, the hydrodynamic impact of the RW on 30-m depth aquifer expanded downstream. However, the 50-m and 80-m depth groundwater levels showed decreasing trend with seasonal variations, due to groundwater pumping. The 30-m depth aquifer was mainly recharged by RW, being evidenced by the enriched δ2H and δ18O. The depleted δ2H and δ18O of the 50-m and 80-m depth groundwater indicated that they were dominated by regional groundwater with meteoric origin. The heterogenous properties of the multi-layer alluvial aquifer offer the preferential flow path for RW transport in the aquifers. The proportion of the RW in the aquifers decreases with depth that was calculated by the chloride conservative mixing model. The increased lateral hydraulic gradient (0.43%) contributes to the RW transport in the 30-m depth aquifer. RW usage changed 30-m depth groundwater type from Ca·Mg-HCO3 to Na·Ca·Mg-HCO3·Cl. RW preferentially recharged the 50-m and 80-m depth aquifers by vertical leakage.

scholarly journals Dyadobacter beijingensis sp. nov., isolated from the rhizosphere of turf grasses in China

2007 ◽  
Vol 57 (4) ◽  
pp. 862-865 ◽  
Author(s):  
Zhi Dong ◽  
Xiaoyu Guo ◽  
Xiaoxia Zhang ◽  
Fubin Qiu ◽  
Lei Sun ◽  
...  
Keyword(s):  
Dna Hybridization ◽  
Gene Sequence ◽  
Novel Species ◽  
Sequence Similarity ◽  
Reclaimed Water ◽  
Rrna Gene ◽  
Rhizospheric Soil ◽  
Rrna Gene Sequence ◽  
Beijing China ◽  
Type Strains

Strain A54T was isolated from rhizospheric soil of turf grasses irrigated with reclaimed water in Taoranting Park, Beijing, China. Phenotypic, chemotaxonomic and polygenetic analyses established the affiliation of the isolate to the genus Dyadobacter. Strain A54T possessed 97.7, 94.4 and 94.7 % 16S rRNA gene sequence similarity with respect to the type strains of Dyadobacter fermentans, D. hamtensis and D. crusticola, respectively. Furthermore, DNA–DNA hybridization did not show significant relatedness (<25 % hybridization) between strain A54T and D. fermentans ATCC 700827T. Therefore, these results indicate that strain A54T belongs to a novel species of the genus Dyadobacter, for which the name Dyadobacter beijingensis sp. nov. is proposed. The type strain is strain A54T (=CGMCC 1.6375T=JCM 14200T).

scholarly journals Impact of Long-Term Reclaimed Water Irrigation on Trace Elements Contents in Agricultural Soils in Beijing, China

Water ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1716 ◽  
Author(s):  
Yaqi Hu ◽  
Wenyong Wu ◽  
Di Xu ◽  
Honglu Liu
Keyword(s):  
Trace Elements ◽  
Trace Element ◽  
Ecological Risk ◽  
Agricultural Soils ◽  
Reclaimed Water ◽  
Soil Layer ◽  
Potential Ecological Risk ◽  
Beijing China ◽  
Reclaimed Water Irrigation

The rapid increase of reclaimed water irrigation on agricultural soils requires investigation of its impact on soil health. In this study, a simulation experiment for various lengths of long-term reclaimed water irrigation time (98, 196 and 236 years, respectively) was conducted in the southeast suburb of Beijing, China. Unirrigated soil served as the control. The environmental behavior of seven trace elements (As, Cd, Cr, Cu, Hg, Pb and Zn) at different soil depths in 0–600 cm profiles was analyzed. Results showed that the 0–30 and 200–300 cm soil layers were more likely to accumulate trace elements under long-term reclaimed water irrigation, although the accumulation in the 0–600 cm profiles was not particularly obvious. Correlation analysis showed that the trace element concentrations and distribution were significantly related to clay fraction and organic matters (OM), whereas they were not related to redox potential (Eh). The potential ecological risk assessment showed that the long-term reclaimed water irrigation did not result in a significantly increased ecological risk. However, Cd and Hg were identified as the metals with the highest potential ecological risk in the study area and the trace element contents in the top 0–30 cm soil layer should be carefully monitored. Future studies are required to clarify the environmental risks of trace elements under long-term reclaimed water irrigation as they might slowly accumulate in soil with time.

scholarly journals A multivariate analysis of the spatial variations of water quality during high-flow period in the Chaobai River (Beijing, China) restored by reclaimed water

2021 ◽  
Author(s):  
Rui Zhao ◽  
Hongmei Bu ◽  
Xianfang Song ◽  
Yinghua Zhang
Keyword(s):  
Water Quality ◽  
Reclaimed Water ◽  
Principal Component ◽  
Spatial Variations ◽  
High Flow ◽  
Quality Analysis ◽  
Multivariate Statistical ◽  
Data Set ◽  
High Flow Period ◽  
Beijing China

Abstract Reclaimed water has demonstrated its broad applications in social construction to alleviate the contradiction of water shortage in Beijing, China. Using multivariate statistical analysis, the current study investigated the spatial variations of water quality in the Chaobai River restored by reclaimed water during the high-flow period. Hierarchical cluster analysis (CA) classified the 11 sampling sites into four clusters, namely most polluted, highly polluted, moderately polluted, and lowly polluted sections. The Kruskal-Wallis test showed that pH, TDS, EC, Ca2+, Mg2+, Cl−, SO42−, NO3−-N, and TN had significant spatial differences among four clusters (p &lt; 0.05). Mean value of total nitrogen (TN) in the most polluted exceeded the guideline (15 mg/L) of the Water Quality Standard for Scenic Environment Use, reaching 22.3 mg/L. Principal component analysis (PCA) extracted three principal components (PCs) accounting for 81.5% of the total variance in the data set of water quality. Three PCs reflected the chemical characteristics of reclaimed water, mineral pollution, and nutrient pollution, respectively. With the ordination biplot of sampling sites defined by the first and second PCs, PCA provided a classification of sampling sites based on the similarity of pollution sources, which supported the results of CA. The results revealed that water quality of the Chaobai River restored by reclaimed water was affected by untreated domestic and agricultural sewage with nitrogen and minerals being the main pollutants along the river basin. This study showed rivers restored by reclaimed water had significant spatial variations of water quality, demonstrating effectiveness of multivariate statistical methods on water quality analysis.

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