Groundwater vulnerability has increased in recent decades due to several factors, but mainly due to climate change. A short summary of this paper. Results from the study show that about 30% of the total area was prone to high and very high groundwater vulnerability. Groundwater quality and vulnerability assessment in Savar, Dhaka, Bangladesh. Groundwater Vulnerability in Western Herzegovina Mladen Zelenika, Ivan Slišković, Božo Soldo Abstract: The full and partial hydrogeological barriers together with terrains of low and high permeability, springs and surface watercourses have been mapped. The obtained vulnerability maps from the modified DRASTIC method revealed that about 70% of the area was under very low to low vulnerable zones, whereas 14% of the area was under high to very high vulnerable zones. It provides drinking water to almost 50 % of the Lebanese population. Michael J. Singleton . (2003) give a definition for the vulnerability as the degree to which a system, subsystem, or system component is likely to experience harm due to exposure to a hazard. Ketut Prasetyo. IAHS-AISH Publication 342, 71-74. With the determination of the different climatic processes driving the semicentennial trends prevailing in the shallow groundwater, the high vulnerability of the recharge zone is underlined, while the outlined overpressured flow system seems to act independently from semicentennial precipitation trends. Ahmed KM, Sultana S, Hasan MA, Bhattacharya P, Hasan MK, Burgess WG, Hoque MA. groundwater vulnerability has been raised to high for a 30 m radius around each individual well identified to be part of a cluster. Groundwater vulnerability assessments provide a measure of the sensitivity of groundwater quality to an imposed contaminant load and are globally recognized as an essential element of all aquifer management and protection plans. GENERALISATION AND PERSPECTIVES Turner et al. The Susceptibility Index (SI) results showed that the groundwater vulnerability of the studied aquifer ranges from low to very high. This approach examines the relationship between the … This study aims at the vulnerability assessment of the shallow aquifer of such a salinity-affected region of coastal Bangladesh. The Llagas and Coyote subbasins exhibit high to very high groundwater vulnerability in both the Shallow and Principal aquifers. A valuable tool used for groundwater quality protection is 'groundwater vulnerability mapping'. It should be noted that groundwater vulnerability maps are accurate to the scale at which they are produced. Groundwater quality of upper and lower Dupi Tila aquifers in the megacity Dhaka, Bangladesh. Groundwater vulnerability mapping is used as a guide in determining which areas are more susceptible to groundwater contamination within the mapped area. I. groundwater vulnerability assessment approaches and the consequent opportunities and challenges associated with their wide scale application under Indian conditions. The total area is about 1600 km². Groundwater vulnerability maps. Instead, the high vulnerability in the north of Germany, in Belgium, and Netherlands, as well as in the North-East part of Europe can be explained by the highest recharge, low water table and unconsolidated sediments. Time scales are also important when mapping vulnerability to specific pollutants that become less harmful over time. Analysis and Results Human Activity Impact Index Vulnerability Area (km2) Area (%) Very Low 157.3 3.8 Low 953.7 22.8 Moderate 2,409.8 57.6 High 647.7 15.5 Very high 16.6 0.4 The uncontrolled and rapid development over the past two decades has lead to a continuously high level of pollution of this Examples of groundwater vulnerability. groundwater vulnerability to non point source pollution under conflicting land use pattern. [17] DRASTIC- geostatistical techniques Modified DRASTIC model by incorporating simple statistical and 35 Full PDFs related to this paper. Jeita spring is the most important spring of Lebanon. All groundwater is to some degree vulnerable and the screening tool produced for the current project is designed to reflect the ability of contaminants to reach the water table surface across Northern Ireland. IOP Conference Series: Earth and Environmental Science. The groundwater level and net recharge were found to be having a greater influence on groundwater vulnerability. The map has five risk categories (High, Medium-High, Medium, Medium-Low and Low) based on the likelihood of a pollutant reaching the groundwater (i.e. groundwater vulnerability mapping in Denmark has been described by (Thomsen et al. Assessment Report – Chapter 4: Vulnerable Groundwater Areas Niagara Peninsula Source Protection Area NPCA 92 recommended setback distance from contamination sources in Ontario Regulation 903 (Wells Regulation) as … Groundwater vulnerability. About 21.74% of the study area falls in high vulnerability zones. Most of the area (90%) has moderate to very high pollution susceptibility mainly due to low slope, agricultural land, high recharge rate, sandy soil dominance and low water table depth. I.C. The groundwater vulnerability map. Akther H, Ahmed MS, Rasheed KBS. 2010. High alpine karst plateaus are recharge areas for major drinking water resources in the Alps and many other regions. This describes the vulnerability of groundwater to pollution and what, if any, natural protection exists. Vulnerability assessment is an essential step in assessing groundwater contamination. This paper. • A ground-water age was applied to assess the vulnerability of groundwater to contamination. Data and Maps. A 30m radius was chosen based on the . • The first groundwater vulnerability maps in UK drawn up and published in late 1980s for main aquifers in the Midlands; based on the national soil survey database and aquifer properties; • Used to influence diffuse land-use activity - e.g. [email protected]; Chemical Sciences Division, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California, USA. Using this classification a groundwater vulnerability potential map (Fig.10) was generated which shows that 17.39% area falls in low vulnerability zone and 60.87% falls in medium vulnerability zone. The remarkable disparity has been achieved from both applied models, therefore the outcome desirable to be validated. In this study, we applied a complex approach to determine groundwater vulnerability at a regional scale in the Piedmont region including high-resolution climate models. COP model comprises (very low to high), while VLDA model embraces (low to very high) groundwater vulnerability classes. Deep groundwater is considered less vulnerable than shallow groundwater, because of the longer travel times necessary for a pollutant to reach a well. the vulnerability), the types of aquifer present and the potential impact (i.e. The southwestern coastal region of Bangladesh has a severe problem of extracting groundwater due to salinity intrusion. into five range values of groundwater vulnerability: very low, low, moderate, high, and very high. Four groundwater vulnerability categories are defined: extreme (E), high (H), moderate (M) and low (L). considered to be high. IN W ESTERN NILE DELTA AQUIFER, EGY PT . Examples of groundwater vulnerability Back to top of page. the aquifer designation status). The subsoil permeability and depth, and localities of point recharge are mapped and combined to providing a groundwater vulnerability assessment for any area or site. Groundwater vulnerability is defined as the tendency and likelihood for general contaminants to reach the water table after introduction at the ground surface. Total 7 hydrogeological parameters have been considered for this study, and the final groundwater vulnerability map has been prepared by overlay weighted method with the help of DRASTIC index, which is classified into 5 vulnerable classes (very high, high, moderate, low, and very low). groundwater vulnerability such as infiltration capacity, hydraulic conductivity, effective porosity, slope, land cover, depth to groundwater and topographic wetness index (TWI) were considered in this study. A subset of the ‘extreme’ The method described here above is only a particular example where intrinsic vulnerability of the groundwater resource (as target) is considered. 2004) and (Thomsen and Søndergaard 2007) and involves approximately the 40 % (17,476 km2) of the total Danish land area that is classified as particularly valuable for groundwater abstraction. High . Dissolved noble gas and isotopic tracers reveal vulnerability of groundwater in a small, high‐elevation catchment to predicted climate changes. READ PAPER . 1. These maps show the vulnerability (or level of risk) of aquifers to contamination relating to physical characteristics of the location, such as the depth to the water table and soil type. ASSESMENT OF GROUNDWATER VULNERABILITY TO POLLUTION . Specific groundwater vulnerability consists of three classifications, which is low, medium, and high. Well-established methods for the vulnerability mapping of groundwater to contamination have not been applied to such areas yet. A groundwater vulnerability map for southern Vancouver Island is shown in Figure 14.4.3. In addition, these areas should not be converted into housing developments. In areas with high and very high vulnerability to groundwater pollution, there should be restrictions on soil fertilization as well as permanent pasture, or afforestation should be introduced in the arable land. The groundwater mapping is directly paid by the consumers via an additional 0.09 euros per cubic metre of water. Introduction . Download PDF. The Department of Land and Water Conservation (DLWC) does not endorse the expansion Key words: groundwater vulnerability, SINTACS, DRASTIC, pollution, Environment Berrechid plain. Popescu et al. Karst Groundwater Vulnerability and Risk to Pollution Hazard in the Eastern Part of Gunungsewu Karst Area. Asaad M. Armanuos 1, Ayman Allam 2 and Abdelazim M. Negm 3 . This approach provides a visual analysis for helping planners and decision makers to achieve the sustainable management of water resources. … Abstract. 2011. It constitutes a major portion of the earth’s water circulatory system known as … Jean E. Moran. Correlation analysis showed a significant association between high groundwater NO3--concentration and distance between LULC types. The high vulnerability is driven primarily by the high sensitivity in these two subbasins. INTRODUCTION The Berrechid Basin is located in the south of Casablanca, between the Atlantic Ocean and the Phosphate Plateau (Figure 1). sewage sludge spreading. Groundwater is a globally important and valuable renewable resource for human life and economic development. Search for more papers by this author. Moderate- and high-vulnerable zones imply more accessibility of saline surface water to the ground. Download Full PDF Package.
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