Time-dependent, two-dimensional mathematical model for simulating the hydraulic, thermal, and water quality characteristics in shallow water bodies

The Population growths along with rapid industrialization and strain on civic services have been major causes for environmental degradation globally, especially many of surface and subsurface water bodies gets polluted by rapid industrialization and urbanization, usage of chemical fertilizers in agriculture practices, untreated sewage, industrial effluents, etc., and in addition of lack of public awareness may all cause damage to the quality characteristics i.e. physio-chemical changes in water environs. The ground water quality deteriorating due to seepage of pollutants from various polluted water bodies, like ponds, lakes and runoff, etc. Here an attempt is made to know the quality characteristics in the ground water at Auto Nagar area of Guntur by the Water Quality Index (WQI) with the parameters of pH, Chlorides, TDS, Total Hardness, Ca Hardness, Nitrates, Sulphates, Iron, Dissolved Oxygen and it was found that quality ranges of WQI from 37 to 90, which is a satisfactory quality for domestic utilization of ground water resources

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Holistic water quality dynamics in rural artificial shallow water bodies

Journal of Environmental Management ◽

10.1016/j.jenvman.2018.06.076 ◽

2018 ◽

Vol 223 ◽

pp. 676-684 ◽

Cited By ~ 2

Author(s):

Abul Hasan Md Badiul Alam ◽

Koichi Unami ◽

Masayuki Fujihara

Keyword(s):

Water Quality ◽

Shallow Water ◽

Water Bodies

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Numerical Stability Verification of a Two-Dimensional Time-Dependent Nonlinear Shallow Water System Using Multidimensional Wave Digital Filtering Network

Circuits Systems and Signal Processing ◽

10.1007/s00034-012-9461-7 ◽

2012 ◽

Vol 32 (1) ◽

pp. 299-319 ◽

Cited By ~ 5

Author(s):

C.-H. Tseng

Keyword(s):

Shallow Water ◽

Numerical Stability ◽

Water System ◽

Digital Filtering ◽

Time Dependent ◽

Two Dimensional ◽

Shallow Water System

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Lie Group Analysis of a Forced KdV Equation

Mathematical Problems in Engineering ◽

10.1155/2013/845843 ◽

2013 ◽

Vol 2013 ◽

pp. 1-4 ◽

Cited By ~ 1

Author(s):

Motlatsi Molati ◽

Chaudry Masood Khalique

Keyword(s):

Mathematical Model ◽

Shallow Water ◽

Lie Group ◽

Kdv Equation ◽

Group Analysis ◽

Time Dependent ◽

Analysis Approach ◽

External Forcing ◽

Lie Group Analysis ◽

Forcing Term

The Korteweg-de Vries (KdV) equation considered in this work contains a forcing term and is referred to as forced KdV equation in the sequel. This equation has been investigated recently as a mathematical model for waves on shallow water surfaces under the influence of external forcing. We employ the Lie group analysis approach to specify the time-dependent forcing term.

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Algal Demand Drives Sediment Phosphorus Release in a Shallow Eutrophic Cove

Transactions of the ASABE ◽

10.13031/trans.13300 ◽

2019 ◽

Vol 62 (5) ◽

pp. 1315-1324

Author(s):

James A. McCarty

Keyword(s):

Water Quality ◽

Shallow Water ◽

Sediment Core ◽

Algal Growth ◽

Phosphorus Release ◽

Water Bodies ◽

Release Rates ◽

Sediment Samples ◽

P Release ◽

Core Incubation

Abstract. Algae play an important role in the internal nutrient cycling of shallow lakes and coves. Algae of shallow water bodies have been shown to thrive and even lead to eutrophic conditions despite a lack of measurable quantities of biologically available phosphorus (P) in the water during summer months. To study how sediment P release and algal growth are connected, water and sediment samples were collected in a shallow eutrophic cove on Beaver Lake in northwest Arkansas. Water quality profiles depicting temperature, dissolved oxygen, nutrients, metals, and photic zone chlorophyll-a were collected weekly from 21 May to 10 July 2018 at three points in the cove: one shallow, one at the cove midpoint, and one at the deepest part of the cove. Cove sediment samples were collected at similar points as the water quality samples for equilibrium P concentration (EPCo) analysis, sediment core incubation, and sediment composition. EPCo for the sediments ranged from 0.024 to 0.027 mg L-1. Sediment cores exposed to aerobic conditions typical of shallow areas had P release rates ranging from 1.37 to 2.02 mg m-2 d-1. Concentrations of soluble reactive P (SRP) in the water column from the weekly water quality sampling averaged 0.002 ±0.003 mg L-1, and photic zone SRP concentrations averaged 0.002 ±0.004 mg L-1 for all sampling sites. The chlorophyll-a concentration increased from 10 to 40 µg L-1 during the period from 21 May to 25 June. When SRP << EPCo, conditions favor the release of SRP from sediments to the overlying water. This was confirmed with the aerobic sediment core incubation in which algal demand was controlled using dark conditions and the release rates were >1.37 mg L-1 d-1. Core aerobic release rates and EPCo conditions both confirmed the release of P under aerobic conditions; however, it appears that algal demand sustained low SRP conditions. This created a nutrient cycle in which algae imposed a nutrient gradient favoring P release by keeping SRP conditions below the EPCo. This study indicates that algal growth potential in shallow water bodies is not limited by SRP concentrations measured within the water column. Studies of shallow water bodies with low SRP concentrations and high productivity should look to the sediments as a source of P to fuel algal growth. Finally, these findings suggest that coves play an integral part in algal production and should not be overlooked when determining the overall P budget for a lake or reservoir. Keywords: Aerobic phosphorus release, Equilibrium phosphorus concentration, Sediment core incubation.

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