Abstract
A total of 10 groundwater samples were obtained from groundwater wells with depths of around 8-10 meters distributed around Yogyakarta International Airport, Indonesia to test the geochemical of groundwater for assessing the seawater intrusion. Samples were taken into polyethylene bottles with a volume of 1000 ml. These bottles were rinsed to reduce the risk of any contamination prior to their filing with sampled water. Piper Diagram is used to evaluate seawater intrusion by plotting the percentages of cations and anions (in mEq/L) as a single point on the triangle. The groundwater facies' in the study area are CaHCO3 and CaNaHCO3. It suggests that the origins of the elements Ca and Na were estimated to derive from the dissolution of the plagioclase, hornblende, and pyroxene minerals found in the sand sediment, while the elements of HCO3 were estimated from the dissolution of carbonate minerals or the decomposition of organic matter and root respiration in the soil zone may enrich their concentration. The wells affected by slightly freshening were ZAM-04, ZAM-05, ZAM-06, ZAM-08, and ZAM-10. While the wells that are not affected by the intrusion or fresh were ZAM-01, ZAM-03, ZAM-07, and ZAM-09. However, ZAM-02 well which is close to the coastline and the closest to the airport development area was the only well that affected significantly by freshening, comparing with other wells. Another expected controlling factor was the fault in the northern part which continuously leads that location. By supported a flow pattern or large river, it was concluded the alluvial deposits buried the fault, and it was estimated to continue to that location.
Highlights
Yogyakarta International Airport (YIA) master plan was unveiled on 7 August 2012 and was classified as a public international airport due to the restriction of Adisucipto International Airport facilities as an international airport in the province of Daerah Istimewa Yogyakarta, Indonesia
ZAM-02 well which is close to the coastline and the closest to the airport development area was the only well that affected significantly by freshening, comparing with other wells
CaHCO3 facies and CaNaHCO3 facies are the groundwater facies in the study area. It suggests that the origins of the elements Ca and Na were estimated to derive from the dissolution of the plagioclase, hornblende, and pyroxene minerals found in the sand sediment, while the elements of HCO3 were estimated to originate from two alternative sources
Summary
Yogyakarta International Airport (YIA) master plan was unveiled on 7 August 2012 and was classified as a public international airport due to the restriction of Adisucipto International Airport facilities as an international airport in the province of Daerah Istimewa Yogyakarta, Indonesia. To support underground infrastructure and building foundations in urban coastal areas, extensive pumping to lower the water table is carried out This method, can threaten the quality of groundwater as it can cause seawater intrusion. To meet the rising demand, over-exploitation of groundwater from such coastal aquifers accelerates the progress of seawater further into the shore This would contribute to the closure of manufacturing wells due to groundwater pollution due to the mixing of seawater (Nair et al, 2015). Seawater intrusion into coastal aquifers is a natural phenomenon that gradually triggers the issue of groundwater salinization It is in areas where semi-arid conditions lead to high pumping and low recharge extraction rates. This study has a benefit as guidelines for the future policy of groundwater using
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.