Assessment of soil-water vulnerability to salinization in Ben Tre Province using DRASTIC model

Le Ngoc Thanh; Van Tuyet Dao; Van Tan Lam; Quang Dung Nguyen; Hai Tung Luu

doi:10.15625/1859-3097/18227

Author affiliations

Authors

Le Ngoc Thanh Ho Chi Minh City Institute of Resources Geography, VAST, Vietnam; Thuy Loi University - Southern Campus, Ho Chi Minh City, Vietnam
Dao Van Tuyet Department of Management of Scientific Research and External Relations, Binh Duong University, Binh Duong, Vietnam
Lam Van Tan Institute of Applied Technology and Sustainable Development, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam
Nguyen Quang Dung Ho Chi Minh City Institute of Resources Geography, VAST, Vietnam
Luu Hai Tung Ho Chi Minh City Institute of Resources Geography, VAST, Vietnam

DOI:

https://doi.org/10.15625/1859-3097/18227

Keywords:

Soil water, salinization, vulnerability, DRASTIC model.

Abstract

Soil water in the coastal zones is more vulnerable to salinization. Soil-water vulnerability assessment is an effective tool for soil-water management. This study used the DRASTIC model, which is based on seven factors viz: depth to soil water, recharge, soil-water bearing layer, soil media, topography, impact of root zone, and hydraulic conductivity to evaluate soil-water salinization potentiality of Ben Tre Province. The obtained soil-water vulnerability map is divided into three vulnerable zones: low vulnerability zone with 348.59 km² of total area, moderate vulnerability zone with 1898.77 km², and high vulnerability zone having 147.64 km². Moreover, the DRASTIC model was validated by Total dissolved solids (TDS) over the study area. Validation results showed the low vulnerability zone of the moderate saline (TDS = 1,500–7,000 mg/L), while the moderate vulnerability zone of the moderate, high, and very high saline (TDS = 1,500–35,000 mg/L). However, the high vulnerability zone has a very high saline (TDS = 15,000–35,000 mg/L). The study results are of considerable value to land use planning and soil researchers.

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References

Lal, R., and Shukla, M. K., 2004. Principles of soil physics. CRC Press.

Warrick, A. W., 2003. Soil water dynamics. Oxford University Press.

Le, T. N., Tran, D. X., Tran, T. V., Gyeltshen, S., Lam, T. V., Luu, T. H., Nguyen, D. Q., and Dao, T. V., 2021. Estimating soil water susceptibility to salinization in the mekong river delta using a modified drastic model. Water, 13(12), 1636.

Tran, T., Tran, D., Pham, H., Truong, T., Trinh, H., Nguyen, D., Nguyen, B., and Nguyen, H., 2020. Exploring spatial relationship between electrical conductivity and spectral salinity indices in the mekong delta. Journal of Environmental Science and Management, 23(1), 39–49.

Aller, L., and Thornhill, J., 1987. DRASTIC: a standardized system for evaluating ground water pollution potential using hydrogeologic settings. Robert S. Kerr Environmental Research Laboratory, Office of Research and Development, US Environmental Protection Agency.

Nahin, K. T. K., Basak, R., and Alam, R., 2020. Groundwater vulnerability assessment with DRASTIC index method in the salinity-affected southwest coastal region of Bangladesh: a case study in Bagerhat Sadar, Fakirhat and Rampal. Earth Systems and Environment, 4, 183–195.

Pathak, D. R., Hiratsuka, A., Awata, I., and Chen, L., 2009. Groundwater vulnerability assessment in shallow aquifer of Kathmandu Valley using GIS-based DRASTIC model. Environmental geology, 57, 1569–1578.

Oke, S. A., and Fourie, F., 2017. Guidelines to groundwater vulnerability mapping for Sub-Saharan Africa. Groundwater for Sustainable Development, 5, 168–177.

Tomer, T., Katyal, D., and Joshi, V., 2019. Sensitivity analysis of groundwater vulnerability using DRASTIC method: a case study of National Capital Territory, Delhi, India. Groundwater for sustainable development, 9, 100271.

Walton, N. R. G., 1989. Electrical conductivity and total dissolved solids—what is their precise relationship?. Desalination, 72(3), 275–292.

Archie, G. E., 1942. The electrical resistivity log as an aid in determining some reservoir characteristics. Transactions of the AIME, 146(01), 54–62.

Corwin, D. L., and Lesch, S. M. (2005). Apparent soil electrical conductivity measurements in agriculture. Computers and electronics in agriculture, 46(1–3), 11–43.

Oosterbaan, R. J., and Nijland, H. J., 1994. Determining the Saturated Hydraulic Conductivity.

Thanh, L. N., Dung, N. Q., and Tung, L. H., 2019. Assessment of soil and soil-water salinity in Ben Tre province by electromagnetic technology. Vietnam Journal of Marine Science and Technology, 19(4), 507–516.