scholarly journals Insights onto Hydrologic and Hydro-Chemical Processes of Riparian Groundwater Using Environmental Tracers in the Highly Disturbed Shaying River Basin, China

Water ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1939
Author(s):  
Baoling Li ◽  
Xianfang Song ◽  
Lihu Yang ◽  
Dongxu Yao ◽  
Yingchun Xu
Keyword(s):  
Mass Balance ◽  
River Basin ◽  
Anthropogenic Activities ◽  
Groundwater Discharge ◽  
Sampling Period ◽  
Balance Model ◽  
Environmental Tracers ◽  
Mass Balance Model ◽  
Untreated Sewage ◽  
Δ18o And Δd

Understanding the hydrologic and hydrochemistry processes in the riparian area is of great importance for managing and protecting riparian water resources. This paper took a highly disturbed and polluted Shaying River Basin (SRB) of China as the study area. In this research, environmental tracers (hydrochemical and isotopic data of222Rn, δ18O, and δD) and corresponding models (two-component mixing model and 222Rn mass balance model) were employed to investigate the hydrologic and associated hydro-chemical process of riparian groundwater. The results indicated that rivers received groundwater discharge located at Xihua (J8), Zhoukou (Y1), Luohe (S2), and Shenqiu (SY2), and the mixing extent with groundwater was greater in wet seasons than in dry seasons. The 222Rn mass balance model showed that the flux of river water leakage was 3.27 × 10−4 m3/(s·m) at the front of Zhoukou sluice while groundwater discharge was 3.50 × 10−3 m3/(s·m) at the front of Shenqiu sluice during the sampling period. The cation exchange and the dissolution/precipitation of aquifer minerals (including calcite, dolomite, gypsum, and halite) were dominated by geochemical processes. The untreated sewage discharge and fertilizer usage were the main anthropogenic activities affecting the hydrochemistry process in surface water and riparian groundwater. Additionally, our results found that nitrate pollutants derived by riparian groundwater were potential threats to river quality at the lower reaches of Jialu River and Shenqiu county of Shaying River, where the nitrate inputs could be larger during the wet seasons because of higher groundwater discharge.

Evaluation of submarine groundwater discharge into the northern Bohai Bay, China using 226Ra

2015 ◽  
Vol 16 (2) ◽  
pp. 362-368 ◽  
Author(s):  
Xuejing Wang ◽  
Hailong Li ◽  
Yan Zhang ◽  
Chaoyue Wang ◽  
Wenjing Qu ◽  
...  
Keyword(s):  
Mass Balance ◽  
Submarine Groundwater Discharge ◽  
Groundwater Discharge ◽  
Balance Model ◽  
Return Flow ◽  
Bohai Bay ◽  
Mass Balance Model ◽  
Material Transport ◽  
Radium Isotope ◽  
Submarine Groundwater

Submarine groundwater discharge (SGD) has been widely recognized as a significant source of water and dissolved material transport from land to ocean. To quantify SGD into the northern Bohai Bay, China, naturally occurring radium isotope (226Ra) was measured in water samples collected along two transects in September 2012. Based on a tidal prism model, two different flushing times of the coastal water were determined to be 9.1 d and 11.5 d with respect to the different return flow factor (b) obtained from a physical model and a mass balance model of 226Ra and salinity, respectively. Using the derived flushing time, we developed a 226Ra mass balance model to estimate the SGD into the bay, which includes mixing, sedimentary input and SGD. The 226Ra budget indicated the 226Ra input from SGD accounted for 99% of the total tracer input to the northern Bohai Bay. We arrived at an average flux from SGD of 4.83 × 107 m3/d. The large volume of SGD confirms its importance in supplying a considerable quantity of nutrients to the bay.

scholarly journals Estimating submarine groundwater discharge in Jeju volcanic island (Korea) during a typhoon (Kong-rey) using humic-fluorescent dissolved organic matter-Si mass balance

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Hyung-Mi Cho ◽  
Tae-Hoon Kim ◽  
Jae-Hong Moon ◽  
Byung-Chan Song ◽  
Dong-Woon Hwang ◽  
...  
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Mass Balance ◽  
Submarine Groundwater Discharge ◽  
Groundwater Discharge ◽  
Balance Model ◽  
Mass Balance Model ◽  
Seepage Rate ◽  
Fluorescent Dissolved Organic Matter ◽  
Submarine Groundwater

AbstractWe examined the residence time, seepage rate, and submarine groundwater discharge (SGD)-driven dissolved nutrients and organic matter in Hwasun Bay, Jeju Island, Korea during the occurrence of a typhoon, Kong-rey, using a humic fluorescent dissolved organic matter (FDOMH)-Si mass balance model. The study period spanned October 4–10, 2018. One day after the typhoon, the residence time and seepage rate were calculated to be 1 day and 0.51 m day−1, respectively, and the highest SGD-driven fluxes of chemical constituents were estimated (1.7 × 106 mol day−1 for dissolved inorganic nitrogen, 0.1 × 106 mol day−1 for dissolved inorganic phosphorus (DIP), 1.1 × 106 mol day−1 for dissolved silicon, 0.5 × 106 mol day−1 for dissolved organic carbon, 1.6 × 106 mol day−1 for dissolved organic nitrogen, 0.4 × 106 mol day−1 for particulate organic carbon, and 38 × 106 g QS day−1 for FDOMH). SGD-driven fluxes of dissolved nutrient and organic matter were over 90% of the total input fluxes in Hwasun Bay. Our results highlight the potential of using the FDOMH-Si mass balance model to effectively measure SGD within a specific area (i.e., volcanic islands) under specific weather conditions (i.e., typhoon/storm). In oligotrophic oceanic regions, SGD-driven chemical fluxes from highly permeable islands considerably contribute to coastal nutrient budgets and coastal biological production.

A mass-balance model to assess arsenic exposure from multiple wells in Bangladesh

2021 ◽  
Author(s):  
Linden B. Huhmann ◽  
Charles F. Harvey ◽  
Ana Navas-Acien ◽  
Joseph Graziano ◽  
Vesna Slavkovich ◽  
...  
Keyword(s):  
Mass Balance ◽  
Arsenic Exposure ◽  
Balance Model ◽  
Mass Balance Model

Application of a snow cover energy and mass balance model in a balsam fir forest

1990 ◽  
Vol 26 (5) ◽  
pp. 1079-1092 ◽  
Author(s):  
Richard Barry ◽  
Marcel Prévost ◽  
Jean Stein ◽  
Andre P. Plamondon
Keyword(s):  
Mass Balance ◽  
Snow Cover ◽  
Balsam Fir ◽  
Balance Model ◽  
Mass Balance Model

scholarly journals Application of a mass-balance model to a Himalayan glacier

1999 ◽  
Vol 45 (151) ◽  
pp. 559-567 ◽  
Author(s):  
Rijan Bhakta Kayastha ◽  
Tetsuo Ohata ◽  
Yutaka Ageta
Keyword(s):  
Mass Balance ◽  
Surface Albedo ◽  
Balance Model ◽  
Mass Balance Model ◽  
Mass Balances ◽  
Climatic Parameters ◽  
Glacier Surface ◽  
Temperature And Precipitation ◽  
Ice Surface ◽  
Good Agreement

AbstractA mass-balance model based on the energy balance at the snow or ice surface is formulated, with particular attention paid to processes affecting absorption of radiation. The model is applied to a small glacier, Glacier AX010 in the Nepalese Himalaya, and tests of its mass-balance sensitivity to input and climatic parameters are carried out. Calculated and observed area-averaged mass balances of the glacier during summer 1978 (June-September) show good agreement, namely -0.44 and -0.46 m w.e., respectively.Results show the mass balance is strongly sensitive to snow or ice albedo, to the effects of screening by surrounding mountain walls, to areal variations in multiple reflection between clouds and the glacier surface, and to thin snow covers which alter the surface albedo. In tests of the sensitivity of the mass balance to seasonal values of climatic parameters, the mass balance is found to be strongly sensitive to summer air temperature and precipitation but only weakly sensitive to relative humidity.

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