The issues of groundwater Enviroment in Ca Mau peninsula

Groundwater is an important resource of provinces in Ca Mau Peninsula. The water is supplied to household, industrial, agricultural and aquacultural activities. More important, in this area, as the majority of surface water is contaminated and requires further treatment to become usable, the main source of water supply is the groundwater. Under the impacts of socialeconomic development, the increase of population and the urbanization rate in the region, groundwater resource is under a pressure of exploitation and utilization. Yearly exploited amount of groundwater is larger than the replenishment amount in most aquifers, so the groundwater level is lowered gradually year by year. According to statistics from 2000 to 2010, the groundwater level has been lowered from 0 to -14m (in some places, the water level is lowered to -28m below sea level) in qp2-3 and qp1 aquifers, with the highest drops in Bac Lieu and Soc Trang provinces. The amount of pumped groundwater in the region has been increasing from 159.914 to 931.944 m3 / day, whereas the replenishment amount has been decreasing from 526.121 to 185.004 m3 / day. Stated otherwise, groundwater in the region is declining in both volume and quality under the impact of climate change and exploitation activities. This paper uses the DPSIR framework to assess causal relationships of factors that impact to the groundwater environment in the region, and thereby propose appropriate solutions under the impacts. In combination with groundwater environmental indicators to quantify the degradation impacts to groundwater resource, the results of this paper indicate that water supply used mainly in Ca Mau Peninsula is groundwater ( 85.74%); the capacity of renewable water per capita in the region is still very low (80.06 l / day / person); the water loss from aquifer systems is much larger than the amount of replenishment (141.02%), however the amount of water extraction for domestic service was still in permissible limits of the aquifers (8.71%). The numbers show that groundwater in Ca Mau Peninsula is in decline but still within safe limits. Results from this paper can give authorities a more intuitive view about the current situation of groundwater when planning and using water resources.

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Vegetation-Groundwater Relationship Model for Subei Lake Watershed and Prediction of Vegetation Succession Rules under Exploitation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.518-523.4315 ◽

2012 ◽

Vol 518-523 ◽

pp. 4315-4320

Author(s):

Ying Li ◽

Gui Zhang Zhao ◽

Lei Zeng ◽

Cun Liang Wang

Keyword(s):

Groundwater Level ◽

Aquatic Vegetation ◽

Vegetation Succession ◽

Burial Depth ◽

Exploitation And Utilization ◽

Numeric Simulation ◽

Relationship Model ◽

Salix Matsudana ◽

Semi Arid Region ◽

The Impact

Located in an arid and semi-arid region with low rainfall and high evaporation, the Subei Lake watershed has fragile ecological environment; the impact of groundwater level recession on vegetation ecology is the key problem for the exploitation and utilization of groundwater resource in this region. In this paper, a succession model for vegetation and burial depth of groundwater level was constructed through field survey, and was used along with numeric simulation to predict the change in burial depth of groundwater level in the study area under exploitation and to analyze and predict the vegetation succession rules and processes. It is believed from the study that, while groundwater level falls constantly, the burial depth of groundwater level will increase gradually, and succession will occur gradually from aquatic vegetation to mesophytic and xerophytic vegetations, from Carex L. and Iris ensata Thunb shoaly lands to Achnatherum splendens shoaly lands, from Salix psammophila shrubs to Artemisia desterorum Spreng shrubs, and from Populus simonii to Salix matsudana.

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Evaluation of the Impact of Ecological Water Supplement on Groundwater Restoration Based on Numerical Simulation: A Case Study in the Section of Yongding River, Beijing Plain

Water ◽

10.3390/w13213059 ◽

2021 ◽

Vol 13 (21) ◽

pp. 3059

Author(s):

Zijian Ji ◽

Yali Cui ◽

Shouquan Zhang ◽

Wan Chao ◽

Jingli Shao

Keyword(s):

Water Level ◽

Groundwater Level ◽

Positive Impact ◽

Water Infiltration ◽

River Channels ◽

Affected Area ◽

Groundwater Environment ◽

The Impact ◽

The Yongding River ◽

Yongding River

Ecological water supplement relies on river channels to introduce surface water, to make a reasonable supplement of groundwater, to repair the regional groundwater environment and urban river ecosystem. Evaluating the degree of groundwater restoration after ecological water supplement (by taking appropriate measures) is a critical problem that needs to be solved. Thus, based on the Yongding River ecological water supplement in 2019 and 2020, we analyzed the groundwater monitoring situates in the ecological water supplement region. We established an unstructured groundwater flow numerical model in the study area through the quadtree grids. The model was calibrated with the measured water level. The simulated results could accurately reflect the real groundwater dynamic characteristics, and it showed that the water level rise was concentrated in the 3–6 km range of the Yongding River after the ecological water supplement. In 2019, the calculated ecological water infiltration amount was 101.28 × 106 m3, the affected area was 265.19 km2, and the average groundwater level rise in the affected area was 2.10 m. In 2020, the calculated ecological water infiltration amount was 102.64 × 106 m3, the affected area was 506.88 km2, and the average groundwater level rise in the affected area was 1.25 m. While the ecological water supplement had a positive impact on groundwater level restoration, the groundwater level around the typical buildings within the study area, including Beijing West Railway Station and Beijing Daxing International Airport, would not be significantly affected.

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Riparian zone hydrological rehabilitation along the Gyöngyös stream (Hungary)

10.5194/egusphere-egu21-12023 ◽

2021 ◽

Author(s):

Előd Szőke ◽

Péter Csáki ◽

Péter Kutschi ◽

Péter Kalicz ◽

Zoltán Gribovszki

Keyword(s):

Water Supply ◽

Groundwater Level ◽

Riparian Forest ◽

Meteorological Data ◽

Riparian Ecosystems ◽

Monitoring Wells ◽

Double Mass ◽

Relationship Of ◽

The Impact ◽

Positive Effect

Climate change induced drought periods are likely to cause decline in groundwater level, which can degrade riparian ecosystems (such as riparian forest). With a reasonable water supply, water scarcity can be stopped and these valuable ecosystems can be preserved.The aim of the research was to evaluate the impact of water supply interventions regarding habitat reconstruction of Doroszl&#243; meadows near K&#337;szeg (west Hungary). Groundwater monitoring wells have been installed at 4 representative sites of the area. Groundwater wells were 3&#8211;5 m deep and screened at their bottoms (2&#8211;4 m). The water level of the wells was recorded manually, on a weekly basis, with an accuracy of 1 mm. In the neighborhood of the wells surface close soil moisture values were also measured. Data from April 2019 to October 2020 were collected. Local meteorological data measured in K&#337;szeg were also used for analysis.Evaluating the data from each well in the pre-intervention period (the analysis of the relationship of the wells with the control well), we came to the conclusion that the Well-1 and Well-2 behave similarly. The impacts of the water supply on the groundwater level were analysed using a &#8220;double mass curve&#8221; and a &#8220;treatment-control space-time deviations&#8221; approach. Result showed that the intervention had a positive effect only on the Well-3 from the examined wells. The data evaluation denoted that unfortunately the control well was also affected by water supply interventions.This research has been supported by the Ministry of Agriculture in Hungary.

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The Effect Degree Analysis of Human Activities on Regional Groundwater Level Based on Variable Fuzzy Optimization Model

Civil and Environmental Engineering ◽

10.4018/978-1-4666-9619-8.ch019 ◽

2016 ◽

pp. 466-479

Author(s):

Dong Liu ◽

Wenting Liu ◽

Tianqi Luo

Keyword(s):

Groundwater Level ◽

Optimization Model ◽

Human Activities ◽

Local Economic Development ◽

Fuzzy Optimization ◽

Assessment System ◽

Groundwater Resource ◽

Groundwater Exploitation ◽

On Farm ◽

The Impact

Along with the population increasing and social economic developing rapidly, the groundwater resource is affected by human activities seriously. In order to achieve optimal local allocation of water resources and promotion of local economic development, a suitable method for measuring the effect degree of human activities on groundwater resource system is very important. In this paper, regarding Hongxinglong Administration of Heilongjiang Agricultural Reclamation in China as the study area, the comprehensive assessment system to analysis the influence of human activities on groundwater level change with eight evaluated indicators closely related to the amount of groundwater exploitation is established by applying variable fuzzy optimization model. According to relative superiority, the function of effect degree index to evaluate the impact situation is constructed. The results in 2012 show that the human activities on Farm Youyi have the strongest impact on groundwater level variation, while Farm Beixing weakest. Comparing the results from 2003 to 2012, the trend of most effect degree indices reveals decrease by some effective measures. However, there are four farms whose human activities have a stronger influence on groundwater table.

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The Effect Degree Analysis of Human Activities on Regional Groundwater Level Based on Variable Fuzzy Optimization Model

International Journal of Agricultural and Environmental Information Systems ◽

10.4018/ijaeis.2015070105 ◽

2015 ◽

Vol 6 (3) ◽

pp. 63-76

Author(s):

Dong Liu ◽

Wenting Liu ◽

Tianqi Luo

Keyword(s):

Groundwater Level ◽

Optimization Model ◽

Human Activities ◽

Local Economic Development ◽

Fuzzy Optimization ◽

Assessment System ◽

Groundwater Resource ◽

Groundwater Exploitation ◽

On Farm ◽

The Impact

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Investigating Groundwater Condition and Seawater Intrusion Status in Coastal Aquifer Systems of Eastern India

Water ◽

10.3390/w13141952 ◽

2021 ◽

Vol 13 (14) ◽

pp. 1952

Author(s):

Subrata Halder ◽

Lingaraj Dhal ◽

Madan K. Jha

Keyword(s):

Groundwater Quality ◽

Seawater Intrusion ◽

Groundwater Level ◽

Coastal Aquifer ◽

Quality Data ◽

Confined Aquifer ◽

Groundwater Levels ◽

Post Monsoon ◽

Aquifer Systems ◽

Sustainable Water Supply

Providing sustainable water supply for domestic needs and irrigated agriculture is one of the most significant challenges for the current century. This challenge is more daunting in coastal regions. Groundwater plays a pivotal role in addressing this challenge and hence, it is under growing stress in several parts of the world. To address this challenge, a proper understanding of groundwater characteristics in an area is essential. In this study, spatio-temporal analyses of pre-monsoon and post-monsoon groundwater-levels of two coastal aquifer systems (upper leaky confined and underlying confined) were carried out in Purba Medinipur District, West Bengal, India. Trend analysis of seasonal groundwater-levels of the two aquifers systems was also performed using Mann-Kendall test, Linear Regression test, and Innovative Trend test. Finally, the status of seawater intrusion in the two aquifers was evaluated using available groundwater-quality data of Chloride (Cl−) and Total Dissolve Solids (TDS). Considerable spatial and temporal variability was found in the seasonal groundwater-levels of the two aquifers. Further, decreasing trends were spotted in the pre-monsoon and post-monsoon groundwater-level time series of the leaky confined and confined aquifers, except pre-monsoon groundwater-levels in Contai-I and Deshpran blocks, and the post-monsoon groundwater-level in Ramnagar-I block for the leaky confined aquifer. The leaky confined aquifer in Contai-I, Contai-III, and Deshpran blocks and the confined aquifer in Nandigram-I and Nandigram-II blocks are vulnerable to seawater intrusion. There is an urgent need for the real-time monitoring of groundwater-levels and groundwater quality in both the aquifer systems, which can ensure efficient management of coastal groundwater reserves.

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Characterization of the subsurface urban heat island and its sources in the Milan city area, Italy

Hydrogeology Journal ◽

10.1007/s10040-021-02387-z ◽

2021 ◽

Author(s):

Alberto Previati ◽

Giovanni B. Crosta

Keyword(s):

Urban Heat Island ◽

Urban Areas ◽

Heat Fluxes ◽

Shallow Aquifer ◽

Heat Island ◽

Groundwater Temperature ◽

City Area ◽

Groundwater Environment ◽

Urban Heat ◽

The Impact

AbstractUrban areas are major contributors to the alteration of the local atmospheric and groundwater environment. The impact of such changes on the groundwater thermal regime is documented worldwide by elevated groundwater temperature in city centers with respect to the surrounding rural areas. This study investigates the subsurface urban heat island (SUHI) in the aquifers beneath the Milan city area in northern Italy, and assesses the natural and anthropogenic controls on groundwater temperatures within the urban area by analyzing groundwater head and temperature records acquired in the 2016–2020 period. This analysis demonstrates the occurrence of a SUHI with up to 3 °C intensity and reveals a correlation between the density of building/subsurface infrastructures and the mean annual groundwater temperature. Vertical heat fluxes to the aquifer are strongly related to the depth of the groundwater and the density of surface structures and infrastructures. The heat accumulation in the subsurface is reflected by a constant groundwater warming trend between +0.1 and + 0.4 °C/year that leads to a gain of 25 MJ/m2 of thermal energy per year in the shallow aquifer inside the SUHI area. Future monitoring of groundwater temperatures, combined with numerical modeling of coupled groundwater flow and heat transport, will be essential to reveal what this trend is controlled by and to make predictions on the lateral and vertical extent of the groundwater SUHI in the study area.

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Measuring the Impact of a Full Service Grocery Store in a Food Desert

The International Journal of Community and Social Development ◽

10.1177/25166026211015488 ◽

2021 ◽

Vol 3 (2) ◽

pp. 161-176

Author(s):

Kellie Schneider ◽

Diana Cuy Castellanos ◽

Felix Fernando ◽

Jeanne A. Holcomb

Keyword(s):

Systems Engineering ◽

Low Income ◽

Social Impact ◽

Food Deserts ◽

Well Being ◽

Environmental Indicators ◽

Grocery Store ◽

The Impact ◽

Health And Well Being

Food deserts, areas in which it is difficult to obtain affordable, nutritious food, are especially problematic in low-income neighbourhoods. One model for addressing food hardship and unemployment issues within low-income food deserts is a cooperative grocery store. Through the cooperative model, the grocery store can serve as a cornerstone to address socio-economic marginalisation of low-income neighbourhoods and improve the health and well-being of its residents. It is important for communities and policymakers to be able to assess the effectiveness of these types of endeavours beyond traditional economic factors such as profitability. This article uses a systems engineering approach to develop a framework for measuring the holistic impact of a cooperative grocery store on community health and well-being. This framework encompasses values that characterise the relationship between food retail, economic viability and social equality. We develop a dashboard to display the key metrics for measuring the economic, social and environmental indicators that reflect a grocery store’s social impact. We demonstrate the usefulness of the framework through a case study of a full-service cooperative grocery store that is planned within the city of Dayton, OH.

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Monitoring the Impact of the Large Building Investments on the Neighborhood

Applied Sciences ◽

10.3390/app11146537 ◽

2021 ◽

Vol 11 (14) ◽

pp. 6537

Author(s):

Marian Łupieżowiec

Keyword(s):

Groundwater Level ◽

Soil Improvement ◽

Deep Excavation ◽

Large Area ◽

Safety Measures ◽

High Rise ◽

The Impact ◽

Large Building ◽

Additional Safety ◽

Made In

The article presents the concept of monitoring buildings and infrastructure elements located near large construction investments (the construction of high-rise buildings of the Oak Terraces housing estate in Katowice and the construction of a tunnel under the roundabout in Katowice along the intercity express road DTŚ). The impacts include deep excavation, lowering of the groundwater level over a large area, and dynamic influences related to the use of impact methods of soil improvement. The presented monitoring includes observation of the groundwater level with the use of piezometers, geodetic measurements of settlement and inclinations, as well as the measurement of vibration amplitudes generated during the works involving shocks and vibrations. It was also important to observe the development of cracks on the basis of a previously made inventory of damage. The results of the monitoring allow corrections to be made in the technology of works (e.g., reduction of vibration amplitudes, application of additional protections at excavations, etc.) or the use additional safety measures. Currently, there are also monitoring systems used during the operation of completed facilities.

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