scholarly journals Historical analysis of a karst aquifer: recharge, water extraction, and consumption dynamics on a tourist island (Cozumel, Mexico)

2021 ◽  
Vol 57 ◽  
pp. 16
Author(s):  
Gerardo Hernández-Flores ◽  
Martha Angélica Gutiérrez-Aguirre ◽  
Adrián Cervantes-Martínez ◽  
Ana Elizabeth Marín-Celestino
Keyword(s):  
Catchment Area ◽  
Water Resource Management ◽  
Karst Aquifer ◽  
Historical Analysis ◽  
Water Extraction ◽  
Groundwater Extraction ◽  
Aquifer Recharge ◽  
Monthly Data ◽  
Cozumel Island ◽  
Increasing Trends

On Cozumel Island, access to freshwater depends on the extraction of the resource from the aquifer located north of the island (catchment area). Water resource management on the island must be based on updated knowledge of the indicator dynamics related to the recharge of the aquifer, groundwater extraction and the distribution of the resource. In this study, trends, variations and time series of 30 years of monthly data for precipitation, temperature, evapotranspiration, and estimated aquifer recharge were calculated for the catchment area. Additionally, groundwater extraction, water consumption for the main uses over a 13-year period (monthly data), and the 5-year status of wells were considered. The results show decreasing trends in precipitation and estimated recharge volumes in the catchment area, in addition to increasing trends in mean air temperature, evapotranspiration, water extraction volumes and consumption by the commercial sector for the considered time periods. Additionally, an increase in dejected (77%) and reposed (38%) wells within the catchment area was observed. Evidence from this study suggests a dynamic behaviour of the analysed indicators over time that increases pressure on karstic, Caribbean aquifers for which monthly monitoring and data analysis are encouraged as the basis for adequate management.

Deterioration in the Water Quality of Groundwater in Some Municipal Water Extraction Plants in Finland

1979 ◽  
Vol 10 (2-3) ◽  
pp. 171-190
Author(s):  
Pertti Lahermo ◽  
Jouko Parviainen
Keyword(s):  
Water Quality ◽  
Urban Areas ◽  
Water Extraction ◽  
Groundwater Extraction ◽  
Dissolved Solids ◽  
Municipal Water ◽  
The 1960S

In this study the changes in the quality of groundwater are described on the basis of material collected at some groundwater extraction plants situated mainly in urban areas. The causes of the marked increase in the content of dissolved solids are evaluated from the 1960s onwards.

The Stackelberg Games of Water Extraction with Myopic Agents

2021 ◽  
Author(s):  
Alain Jean-Marie ◽  
Mabel Tidball ◽  
Víctor Bucarey López
Keyword(s):  
Stackelberg Game ◽  
Infinite Horizon ◽  
Dynamic Game ◽  
Water Extraction ◽  
Discount Factor ◽  
Stackelberg Games ◽  
Groundwater Extraction ◽  
Strategic Interactions ◽  
Water Users ◽  
Threshold Policies

We consider a discrete-time, infinite-horizon dynamic game of groundwater extraction. A Water Agency charges an extraction cost to water users and controls the marginal extraction cost so that it depends not only on the level of groundwater but also on total water extraction (through a parameter [Formula: see text] that represents the degree of strategic interactions between water users) and on rainfall (through parameter [Formula: see text]). The water users are selfish and myopic, and the goal of the agency is to give them incentives so as to improve their total discounted welfare. We look at this problem in several situations. In the first situation, the parameters [Formula: see text] and [Formula: see text] are considered to be fixed over time. The first result shows that when the Water Agency is patient (the discount factor tends to 1), the optimal marginal extraction cost asks for strategic interactions between agents. The contrary holds for a discount factor near 0. In a second situation, we look at the dynamic Stackelberg game where the Agency decides at each time what cost parameter they must announce. We study theoretically and numerically the solution to this problem. Simulations illustrate the possibility that threshold policies are good candidates for optimal policies.

scholarly journals Spatiotemporal change analysis of long time series inland water in Sri Lanka based on remote sensing cloud computing

2022 ◽  
Vol 12 (1) ◽  
Author(s):  
Jianfeng Li ◽  
Jiawei Wang ◽  
Liangyan Yang ◽  
Huping Ye
Keyword(s):  
Remote Sensing ◽  
Cloud Computing ◽  
Surface Water ◽  
Water Resources ◽  
Sri Lanka ◽  
Water Resource Management ◽  
Google Earth ◽  
Water Extraction ◽  
Inland Lakes ◽  
Lakes And Reservoirs

AbstractSri Lanka is an important hub connecting Asia-Africa-Europe maritime routes. It receives abundant but uneven spatiotemporal distribution of rainfall and has evident seasonal water shortages. Monitoring water area changes in inland lakes and reservoirs plays an important role in guiding the development and utilisation of water resources. In this study, a rapid surface water extraction model based on the Google Earth Engine remote sensing cloud computing platform was constructed. By evaluating the optimal spectral water index method, the spatiotemporal variations of reservoirs and inland lakes in Sri Lanka were analysed. The results showed that Automated Water Extraction Index (AWEIsh) could accurately identify the water boundary with an overall accuracy of 99.14%, which was suitable for surface water extraction in Sri Lanka. The area of the Maduru Oya Reservoir showed an overall increasing trend based on small fluctuations from 1988 to 2018, and the monthly area of the reservoir fluctuated significantly in 2017. Thus, water resource management in the dry zone should focus more on seasonal regulation and control. From 1995 to 2015, the number and area of lakes and reservoirs in Sri Lanka increased to different degrees, mainly concentrated in arid provinces including Northern, North Central, and Western Provinces. Overall, the amount of surface water resources have increased.

scholarly journals FACTORS INFLUENCING KARST AQUIFER RECHARGE AS EVIDENCED THROUGH VADOSE DYE TRACING

2018 ◽  
Author(s):  
Amaël Poulain ◽  
◽  
Arnaud Watlet ◽  
Gaëtan Rochez ◽  
Olivier Kaufmann ◽  
...  
Keyword(s):  
Karst Aquifer ◽  
Aquifer Recharge ◽  
Dye Tracing ◽  
Factors Influencing

Numerical long-term assessment of managed aquifer recharge from a reservoir into a karst aquifer in Jordan

2016 ◽  
Vol 540 ◽  
pp. 603-614 ◽  
Author(s):  
Julian Xanke ◽  
Hervé Jourde ◽  
Tanja Liesch ◽  
Nico Goldscheider
Keyword(s):  
Karst Aquifer ◽  
Managed Aquifer Recharge ◽  
Aquifer Recharge

scholarly journals Migration characteristics of atrazine in porous media during managed aquifer recharge

2021 ◽  
Author(s):  
Xiuxiu Sun ◽  
Weiping Wang ◽  
Weidong Zhao ◽  
Shisong Qu ◽  
Qingyang Zheng
Keyword(s):  
Yellow River ◽  
Karst Aquifer ◽  
Peak Time ◽  
Aquifer Recharge ◽  
Groundwater Velocity ◽  
Sand Column ◽  
Flow Rates ◽  
Gravel Layer ◽  
Sand And Gravel ◽  
Adsorption Desorption

Abstract To study the influences of sand and gravel layer and groundwater velocity of Yufuhe River on atrazine migration, adsorption-desorption and sand column experiments were carried out. Results show that the adsorption capacity of montmorillonite, raw sand and washed sand to atrazine sequentially weakens. In different media, the time for atrazine concentrations to peak in washed sand with motomorillonite (WSM), raw sand and washed sand is 60, 135 and 105 minutes respectively, and the peak concentration accounts for 84, 90 and 95% of the initial concentrations. Under different flow rates, the peak time in washed sand at flow rates of 100, 150 and 200 mL/min is 135, 105 and 75 minutes, and the peak time in WSM is 90, 60 and 45 minutes, respectively. Results from this study indicate that increasing flow velocity and suspended colloids concentrations can promote the migration of atrazine in aquifers, while the presence of clay minerals in sand and gravel layer can reduce atrazine migration. Thus, during Yellow River water recharging, the sand and gravel layer of Yufuhe River is helpful to protect the aquifer, but the colloids-associated migration of atrazine can contaminate groundwater in underlying karst aquifer.

scholarly journals Trained meta-models and evolutionary algorithm based multi-objective management of coastal aquifers under parameter uncertainty

2018 ◽  
Vol 20 (6) ◽  
pp. 1247-1267 ◽  
Author(s):  
Dilip Kumar Roy ◽  
Bithin Datta
Keyword(s):  
Coastal Aquifers ◽  
Parameter Uncertainty ◽  
Saltwater Intrusion ◽  
Management Strategies ◽  
Groundwater Extraction ◽  
Aquifer Recharge ◽  
Meta Model ◽  
Aquifer System ◽  
Multi Objective ◽  
Input Parameters

Abstract Meta-model based coupled simulation-optimization methodology is an effective tool in developing sustainable saltwater intrusion management strategies for coastal aquifers. Such management strategies largely depend on the accuracy, reliability, and computational feasibility of meta-models and the numerical simulation model. However, groundwater models are associated with a certain amount of uncertainties, e.g. parameter uncertainty and uncertainty in prediction. This study addresses uncertainties related to input parameters of the groundwater flow and transport system by using a set of randomized input parameters. Three meta-models are compared to characterize responses of water quality in coastal aquifers due to groundwater extraction patterns under parameter uncertainty. The ensemble of the best meta-model is then coupled with a multi-objective optimization algorithm to develop a saltwater intrusion management model. Uncertainties in hydraulic conductivity, compressibility, bulk density, and aquifer recharge are incorporated in the proposed approach. These uncertainties in the physical system are captured by the meta-models whereas the prediction uncertainties of meta-models are further addressed by the ensemble approach. An illustrative multi-layered coastal aquifer system is used to demonstrate the feasibility of the proposed approach. Evaluation results indicate the capability of the proposed approach to develop accurate and reliable management strategies for groundwater extraction to control saltwater intrusion.

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