Application of GIS-Base GALDIT for vulnerability assessment to saltwater intrusion of Holocene coastal aquifer: a case of Quang Nam - Da Nang city, Vietnam
Keywords:saltwater intrusion, GALDIT method, Holocene aquifer, vulnerability, Quang Nam - Da Nang
Groundwater is an essential resource which is influenced by salt water due to the groundwater exploitation in Holocene aquifer of Quang Nam - Da Nang. Hence, the measures for preventing saltwater intrusion and better groundwater management are required. In this study, GALDIT method was utilized to identify the salt water intrusion (SWI) vulnerability zones using monitoring data in Holocene aquifer of Quang Nam - Da Nang. The results of GALDIT method indicated that Da Nang and Hoi An cities were in the high SWI vulnerability zones. The moderate SWI zones were dominant and low vulnerability zones were at the southern part of the study area. The analysis of the monitoring data showed the occurrence of SWI far inland, up to the distance of 12.5 km from the sea shore and suggested the impact of human activities on SWI. The analysis of monitoring data together with GALDIT index indicated that the important of the groundwater abstraction depth or the occurrence of fresh-salt groundwater interface should be considered to improve the result of GALDIT method for the prevention of SWI. In short, the GALDIT used in this study is an important approach for the prevention of SWI in the study area.
Armstrong M.P., Marciano R., 1994. Inverse-distance-weighted spatial interpolation using parallel supercomputers. Photogrammetric Engineering and Remote Sensing, 60(9), 1097–1102.
Bordbar M., Neshat A., Javadi S., 2019. Modification of the GALDIT framework using statistical and entropy models to assess coastal aquifer vulnerability. Hydrological Sciences Journal, 64(9), 1117–1128.
Chachadi A.G., Lobo-Ferreira J.P., 2001. Seawater intrusion vulnerability mapping of aquifers using the GALDIT method. Coastin-A Coastal Policy Res Newsl, 4, 7–9.
Chachadi A.G., Ferreira A.C.A.P.L., 2005. Assessing aquifer vulnerability to sea-water intrusion using GALDIT method: Part 2-GALDIT Indicators Description. In The fourth inter-celtic Colloquium on Hydrology and management of water resources, Portugal.
Chachadi A.G., Lobo-Ferreira J.P., 2007. Assessing aquifer vulnerability to seawater intrusion using GALDIT method: part 2, GALDIT indicators description. Water Celt Countries Quant Qual Clim Var., 310, 172–180.
Chang S.W., Chung I.M., Kim M.G., Tolera M., Koh G.W., 2019. Application of GALDIT in Assessing the Seawater Intrusion Vulnerability of Jeju Island, South Korea. Water, 11(9), 1824.
DWPIC, 2019. Investigation and assessment for determinating forbidden, restricted areas of groundwater exploitation in Quarternery sedimental aquifer and Negogene aquifers from Da Nang to Binh Thuan. Report, in Vietnames.
Hoang N.T.D., 2016. Characteristics of Quaternary Geology and Groundwater Resources in Coastal Plain of Quang Nam Province, doctoral Thesis, Hanoi University of Mining and Geology. In Vietnamese.
Hoang N.T.D., Nguyen D.T., 2005. Estimate potential exploitation reserve of tasteless ground water in Cenozoic sediments at the coastal plain in Quang Nam Province. The 9th Conference on Science and Technology, Ho Chi Minh City-Vietnam, Oct-2005. In Vietnamese.
Kazakis N., Busico G., Colombani N., Mastrocicco M., Pavlou A., Voudouris K., 2019. GALDIT-SUSI a modified method to account for surface water bodies in the assessment of aquifer vulnerability to seawater intrusion. Journal of Environmental Management, 235, 257–265.
Kazakis N., Spiliotis M., Voudouris K., Pliakas F.K., Papadopoulos B., 2018. A fuzzy multicriteria categorization of the GALDIT method to assess seawater intrusion vulnerability of coastal aquifers. Sci. Total Environ, 593–594, 552–566.
Kouz T., Dekkaki H.C., Mansour S., Zerrouk M.H., Mourabit T., 2018. Application of GALDIT Index to Assess the Intrinsic Vulnerability of Coastal Aquifer to Seawater Intrusion Case of the Ghiss-Nekor Aquifer (North East of Morocco). In Groundwater and Global Change in the Western Mediterranean Area Springer, Cham, 169–177.
Le V.H, Le V.T., Ho D.T.H, 2011. The groundwater resources of Quang Nam coastal plain in the context of climate change. Ecological Economy Journal, 40, 128–133.
Li J., Heap A.D., 2011. A review of comparative studies of spatial interpolation methods in environmental sciences: Performance and impact factors Ecological Informatics, 6(3–4), 228–241.
Luoma S., Okkonen J., Korkka-Niemi K., 2017. Comparison of the AVI, modified SINTACS and GALDIT vulnerability methods under future climate-change scenarios for a shallow low-lying coastal aquifer in southern Finland. Hydrogeology Journal, 25(1), 203–222.
NAWAPI, 2016. Report on the status of surface water and groundwater resources in Quang Nam-Da Nang, viewed 17 August 2020,<http://chuyentrang.monre.gov.vn/upload/13363/20161222/TTQH%C4%90TTNN81.docx>. In Vietnamese.
Parizi E., Hosseini S.M., Ataie-Ashtiani B., Simmons C.T., 2019. Vulnerability mapping of coastal aquifers to seawater intrusion: review, development and application. Journal of hydrology, 570, 555–573.
Recinos, N., Kallioras, A., Pliakas, F. and Schuth, C., 2015. Application of GALDIT index to assess the intrinsic vulnerability to seawater intrusion of coastal granular aquifers. Environmental earth sciences, 73(3), 1017–1032.
Saravanan S., Parthasarathy K.S.S., Sivaranjani S., 2019. Assessing coastal aquifer to seawater intrusion: Application of the GALDIT method to the Cuddalore Aquifer, India. In Coastal Zone Management, Elsevier, 233–250.
Seenipandi K., Nainarpandian C., Kandathil R.K., Sellamuthu S., 2019. Seawater intrusion vulnerability in the coastal aquifers of southern India an appraisal of the GALDIT model, parameters’ sensitivity, and hydrochemical indicators. Environmental Science and Pollution Research, 26(10), 9755–9784.
Nguyen B.T., Cao V.A., Nguyen D.T., Hoang T.S., Nguyen V.D., 2018. Status of salt water insutrion in groundwater of Da Nang City and solutions for groundwater abstraction. Journal of Mining and Geology. In Vietnamese, 59(3), 10–20.
Trabelsi N., Triki I., Hentati I., Zairi M., 2016. Aquifer vulnerability and seawater intrusion risk using GALDIT, GQISWI and GIS: case of a coastal aquifer in Tunisia. Environ. Earth Sci., 75, 669.
Tran V.T., Nguyen X.T., Greiving S., 2020. Assessing the conversion between agricultural and built-up area in the Vu Gia-Thu Bon river basin. Vietnam Journal of Science, Technology and Engineering, 62(1), 74–84.