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Field Investigations for Sustainable Groundwater Utilization in the Konan Basin

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  • Madan Jha
  • K. Chikamori
  • Y. Kamii
  • Y. Yamasaki

Abstract

The Konan groundwater basin of Kochi Prefecture, Japan, is experiencing freshwater shortages for the past few years, particularly during the winter season. The present study aimed at analyzing the problem and exploring increased groundwater withdrawals to meet burgeoning freshwater demands in various sectors. The trend analysis of waterconsumption indicates that the groundwater demandwould increase by 43 and 52% by the years 2010 and2025, respectively, compared to 32 100 m 3 d -1 at present.The streamflow of the Monobe River reduces to a minimumin winter and it shows a decreasing trend in recentyears. The geologic investigation results indicatethat unconfined (phreatic) aquifers comprisingalluvial sand and gravel and/or diluvial silty sandand gravel are dominant, and that the northwestern andwestern portions of the basin have greater potentialfor groundwater. Groundwater flows essentially fromnorth to south into the ocean. Groundwater levelfluctuations over the basin vary appreciably in spaceand time, indicating a wide variation of naturalrecharge. Field observations confirm the hypothesisthat stream-aquifer interaction also significantlycontributes to groundwater recharge, besides therainfall infiltration. Further, the pumping testsresults demonstrate that though the aquifers arelow-yielding, enhanced groundwater withdrawals couldbe possible. The aquifer hydraulic conductivity ischaracterized as high and ranges from 65 to 804 m d -1 (mean=229 m d -1 ), thereby suggesting great aquiferheterogeneity. Finally, it is concluded that thelong-term sustainability of the scarce groundwaterresource of the Konan basin is doubtful, and that acomprehensive analysis of the groundwater system isessential prior to formulating plans for the futuregroundwater development and management. Copyright Kluwer Academic Publishers 1999

Suggested Citation

  • Madan Jha & K. Chikamori & Y. Kamii & Y. Yamasaki, 1999. "Field Investigations for Sustainable Groundwater Utilization in the Konan Basin," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 13(6), pages 443-470, December.
    • Handle: RePEc:spr:waterr:v:13:y:1999:i:6:p:443-470
    DOI: 10.1023/A:1008184010262
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    Citations

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    Cited by:

    1. Madan Jha & Gaurav Nanda & Manoj Samuel, 2004. "Determining Hydraulic Characteristics of Production Wells using Genetic Algorithm," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 18(4), pages 353-377, August.
    2. Madan Jha & Deldan Namgial & Y. Kamii & Stefan Peiffer, 2008. "Hydraulic Parameters of Coastal Aquifer Systems by Direct Methods and an Extended Tide–Aquifer Interaction Technique," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 22(12), pages 1899-1923, December.
    3. A. Pryet & B. Labarthe & F. Saleh & M. Akopian & N. Flipo, 2015. "Reporting of Stream-Aquifer Flow Distribution at the Regional Scale with a Distributed Process-Based Model," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 29(1), pages 139-159, January.
    4. Madan Jha & Y. Kamii & K. Chikamori, 2009. "Cost-effective Approaches for Sustainable Groundwater Management in Alluvial Aquifer Systems," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 23(2), pages 219-233, January.
    5. S. Mohanty & Madan Jha & Ashwani Kumar & S. Jena, 2012. "Hydrologic and Hydrogeologic Characterization of a Deltaic Aquifer System in Orissa, Eastern India," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 26(7), pages 1899-1928, May.
    6. Madan Jha & Y. Kamii & K. Chikamori, 2003. "On the Estimation of Phreatic Aquifer Parameters by the Tidal Response Technique," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 17(1), pages 69-88, February.
    7. K. Brindha & L. Elango, 2012. "Impact of Tanning Industries on Groundwater Quality near a Metropolitan City in India," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 26(6), pages 1747-1761, April.
    8. Thendiyath Roshni & Madan K. Jha & Ravinesh C. Deo & A. Vandana, 2019. "Development and Evaluation of Hybrid Artificial Neural Network Architectures for Modeling Spatio-Temporal Groundwater Fluctuations in a Complex Aquifer System," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 33(7), pages 2381-2397, May.
    9. Bin He & Keiji Takase & Yi Wang, 2007. "Regional groundwater prediction model using automatic parameter calibration SCE method for a coastal plain of Seto Inland Sea," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 21(6), pages 947-959, June.

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