Journal of Japanese Association of Hydrological Sciences
Online ISSN : 1883-7166
Print ISSN : 1342-9612
ISSN-L : 1342-9612
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Volume 42, Issue 2
Special issue: "Groundwater recharge: Groundwater as a part of hydrological cycle -from steady state process to unsteady state process-"
Displaying 1-5 of 5 articles from this issue
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FOREWORD
GENERAL ARTICLE
  • Sustainable groundwater management considering potential groundwater recharge in Monsoon Asia
    Jun SHIMADA
    2012 Volume 42 Issue 2 Pages 33-42
    Published: 2012
    Released on J-STAGE: April 15, 2013
    DOIhttps://doi.org/10.4145/jahs.42.33
    JOURNAL FREE ACCESS
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    In the monsoon Asian region where precipitation exceeds evapotranspiration, the surplus water becomes river water discharge or groundwater recharge, and the positive groundwater recharge can exist basically. The sustainable use of groundwater resources can be achievable by managing the abstraction of groundwater within the potential groundwater recharge which can be evaluated by the local hydrological condition. In this report, the author briefly explains the groundwater disasters caused by the excessive pumping that occurs or occurred in major cities in Asia and the related countermeasures. Then advanced examples of the groundwater management considering the regional hydrological cycle performed in Kumamoto area is reported for the way of future groundwater management.
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  • Sustainable groundwater management considering potential groundwater recharge in Monsoon Asia
    Time and spatial balances of infiltration and discharge in hydrologic system
    Hiroyuki TOSAKA
    2012 Volume 42 Issue 2 Pages 43-51
    Published: 2012
    Released on J-STAGE: April 15, 2013
    DOIhttps://doi.org/10.4145/jahs.42.43
    JOURNAL FREE ACCESS
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    In watershed management by national/local governments for securing water resources, conserving environment and preventing hazards, integrated numerical modeling will provide quantitative understanding of the hydrologic system of the objective area. In this paper, the author presents short notes on the general hydrologic conditions concerning the interaction between surface water and groundwater, and refers to the state of the art of numerical technology for surface-subsurfacewater coupled modeling. Some results of the coupled simulations, which show the flow paths of the precipitated water and areal distribution of infiltration/discharge including land and coastal areas, are presented with graphical figures.
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  • Behaviors of water and substances through infiltration and groundwater recharge
    －direct and indirect phenomena－
    Norio TASE
    2012 Volume 42 Issue 2 Pages 53-59
    Published: 2012
    Released on J-STAGE: April 15, 2013
    DOIhttps://doi.org/10.4145/jahs.42.53
    JOURNAL FREE ACCESS
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    Since hydrological systems are basically seamless and continuous, the infiltrated water by rainfall, meltwater, or irrigation water through ground surface causes groundwater level to rise and/or alters their chemical properties simultaneously or with some delay. In these phenomena, the infiltrated water could not necessarily reach groundwater directly and there might be some indirect mechanisms to induce these changes. Understanding differences and relations between direct and indirect phenomena is very important. This paper introduces some examples on this matter and briefly discusses for future researches.
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  • The role of deep groundwater in the water cycle
    Atsunao MARUI
    2012 Volume 42 Issue 2 Pages 61-68
    Published: 2012
    Released on J-STAGE: April 15, 2013
    DOIhttps://doi.org/10.4145/jahs.42.61
    JOURNAL FREE ACCESS
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    To obtain a well understanding and effective use of deep groundwater, the author reviews recent studies about it. Actually, the half of groundwater in the Japanese islands exists as a deep groundwater (Koshigai et al., 2011). There are two way for definition of deep groundwater, one is from the origin, and another way is from statement of it. For example, "volcanic hot spring water" is from origin, and "fossil water" is from statement. And the study shows that regional groundwater flow is influenced of deep groundwater where the upward flow occurred. The area is known as characteristic water body from early days. Also, as a new knowledge, the study indicates a water boundary is not corresponded to the geological interface in the deep groundwater. Incentive study is still needed to make an effective use of deep groundwater.
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