Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Conceptual model of the evolution of groundwater quality at the wet zone in Sri Lanka (1999)
    Springer
    Environmental geology 39 (1999), S. 149-164 
    Details
    ISSN: 1432-0495
    Keywords: Key words Water cycle ; Groundwater flow ; Water quality ; Isotopic composition ; Evolution of groundwater quality
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  The evolution of groundwater quality at a wet zone in Sri Lanka was made clear using field investigation, chemical and isotopic analyses methods. In the wet zone, the concentrations of major ions and electrical conductivity (EC) in the groundwater are low with small seasonal change. Except for sodium, silica and chloride, the EC and other major ion concentrations increase along the groundwater flow direction. The contributions of bicarbonate and calcium ions to the increase in EC are the largest among the major ions. The groundwater quality shows calcium-bicarbonate type, the initial stage of the Chebotarev series. There is a seasonal change in isotopic composition. The isotopically lighter groundwater was found at the valley bottom in the rainy season. Under the very heavy precipitation conditions, the slope of the regression line between δD and δ18O and deuterium excess for groundwater are close to 8 and 10, respectively. In other cases, the slopes of the regression lines and deuterium excess are, less than 8 and 10, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002540050445
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Groundwater use for snow melting on the road (1980)
    Springer
    GeoJournal 4 (1980), S. 173-181 
    Details
    ISSN: 1572-9893
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography
    Notes: Abstract Groundwater use for snow melting on the road began in Nagooka in 1961. Thereafter the shosetsu (snow melting) pipe system using the heat energy of groundwater spread rapidly all over Japan except for Hokkaido. The total length of the shosetsu pipe comprised 571 km in 1977. A preferable range of groundwater temperatures for the shosetsu pipe is from 8° to 18°C, which corresponds to the groundwater temperature in Japan. The actual condition of groundwater use for the shosetsu pipe has been investigated in Nagaoka, where groundwater pumping in total amounts to 5 x 105 m3/day in the heavy snow season. The use of groundwater for shosetsu pipe in Nagaoka is confronted with two serious problems to be overcome. They are land subsidence and competition with other groundwater uses. For purposes of making clear the mechanism of groundwater recharge and of seeking means of groundwater management for the Nagaoka groundwater basin, a digital simulation of groundwater flow was made by using the horizontal two-dimensional model. The results are satisfactory and reveal that one of the main sources of recharge is the Shinano River which flows through the city. The simulation will be a useful means in considering a future plan of groundwater management.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00160744
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Groundwater use for snow melting on the road (1980)
    Springer
    GeoJournal 4 (1980), S. 173-181 
    Details
    ISSN: 1572-9893
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography
    Notes: Abstract Groundwater use for snow melting on the road began in Nagooka in 1961. Thereafter the shosetsu (snow melting) pipe system using the heat energy of groundwater spread rapidly all over Japan except for Hokkaido. The total length of the shosetsu pipe comprised 571 km in 1977. A preferable range of groundwater temperatures for the shosetsu pipe is from 8° to 18°C, which corresponds to the groundwater temperature in Japan. The actual condition of groundwater use for the shosetsu pipe has been investigated in Nagaoka, where groundwater pumping in total amounts to 5 x 105 m3/day in the heavy snow season. The use of groundwater for shosetsu pipe in Nagaoka is confronted with two serious problems to be overcome. They are land subsidence and competition with other groundwater uses. For purposes of making clear the mechanism of groundwater recharge and of seeking means of groundwater management for the Nagaoka groundwater basin, a digital simulation of groundwater flow was made by using the horizontal two-dimensional model. The results are satisfactory and reveal that one of the main sources of recharge is the Shinano River which flows through the city. The simulation will be a useful means in considering a future plan of groundwater management.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00705524
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...