Perbandingan Profil Penurunan Muka Air untuk Akuifer Tidak Terkekang Menggunakan 3D Modflow Studi Kasus  Pantai Indah Kapuk

Amalia Susanto; Budijanto Widjaja; Martin Wijaya

doi:10.28932/jts.v21i2.9647

Authors

Amalia Susanto Program Studi Magister Teknik Sipil, Universitas Katolik Parahyangan, Bandung, 40141, Indonesia
Budijanto Widjaja Program Studi Magister Teknik Sipil, Universitas Katolik Parahyangan, Bandung, 40141, Indonesia
Martin Wijaya Program Studi Magister Teknik Sipil, Universitas Katolik Parahyangan, Bandung, 40141, Indonesia

DOI:

https://doi.org/10.28932/jts.v21i2.9647

Keywords:

Unconfined aquifer, Conductivity, Dewatering, Pumping test

Abstract

Dewatering is required to control the flow of groundwater and to lower the position of the groundwater table during excavation. In planning the dewatering system, parameters related to the flow of water in the soil are required. One of these is the conductivity value, which can be obtained from pumping tests. The sand layer found on the ground surface, which is saturated of water, is referred to as an unconfined aquifer. In this study, conductivity analysis of unconfined aquifer was conducted in PIK2 area using 3 conventional methods which are, Thiem (1906) method and curve matching method of Boulton (1963) and Neuman (1972). Conductivity values obtained from conventional calculations are then analyzed using the help of a program based on the 3D finite difference method Modflow to obtain a pattern of groundwater level decline or can also be called a depression cone. In sandy soil in the PIK2 reclamation area, conductivity values of 5.90×10-5 m/s to 8.08×10-5 m/s were obtained Neuman's method can produce better conductivity values in unconfined aquifers, as shown by the results of the water table profile from the 3D Modflow analysis.

Downloads

Download data is not yet available.

References

ASTM. (2008). Standard Test Method for (Field Procedure) for Withdrawal and Injection Well Tests for Determining Hydraulic Properties of Aquifer Systems. ASTM Standard Test Method, D4050-96 ((February 1997), 1–4. https://doi.org/10.1520/D4050-20.2

Boulton, N. S. (1970). Analysis of data from pumping tests in unconfined anisotropic aquifers. Journal of Hydrology, 10(4), 369–378. https://doi.org/10.1016/0022-1694(70)90223-4

Boulton, N. S., & Pontin, J. M. A. (1971). An extended theory of delayed yield from storage applied to pumping tests in unconfined anisotropic aquifers. Journal of Hydrology, 14(1), 53–65. https://doi.org/10.1016/0022-1694(71)90092-8

Boulton, N. S., Ineson, J., & Engelund, F. (1955). Correspondence. The Drawdown of the Water-Table Under Non-Steady Conditions Near a Pumped Well in an Unconfined Formation. Proceedings of the Institution of Civil Engineers, 4(2), 213–218. https://doi.org/10.1680/ipeds.1955.11846

Darcy, H. (1856). Les fontaines publiques de la ville de Dijon, V. Dalmont, Paris, 647 pp.

Driscoll, F.G (1986). Groundwater and Wells (2nd edition). Johnson Filtration Systems Inc.

Ismail, S. O., & Mawlood, D. (2020). Comparing pumping test between Boulton and Neuman in unconfined aquifer. Zanco Journal of Pure and Applied Sciences, 32(2). https://doi.org/10.21271/zjpas.32.2.2

Kruseman, G. P., & De Ridder, N. A. (1983). Analysis and evaluation of pumping test data (3rd edition). Bulletin - International Institute for Land Reclamation & Improvement (Wageningen), 11.

Neuman, S. P. (1972), Theory of flow in unconfined akuifers considering delayed response of the water table, Water Resour. Res., 8(4), 1031–1045,

Paath, J. R., & Widjaja, B. (2017). Analisis Parameter Hidrogeologi Dengan Beberapa Metode Konvensional Di Akuifer Terkekang. Seminar Nasionalke-2: Sains, Rekayasa & Teknologi UPH, 17–18. https://www.researchgate.net/publication/317312775

Paath, J. R., Widjaja, B., Studi, P., Teknik, M., Parahyangan, U. K., Studi, P., Sipil, T., & Parahyangan, U. K. (2017). Analisis Permeabilitas Tanah Dari Hasil Pumping Test Dengan Beberapa Metode Konvensional. 43–50.

Powers, J. P. et al. (2007), Construction Dewatering and Groundwater Control. New Method and Applications 3rd edition.John Wiley and Sons Inc.

United States Bureau of Land Management. (1995). Geohydrology: Analytical Methods. Utah Regional Depository, 244, 11–12. https://digitalcommons.usu.edu/govdocs/244