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Title Transcription
シンジコ ニオケル エンブン ノウド ト カンレン スイモンリョウ ノ ジケイレツ ブンセキ 1 ツキベツ シリョウ ニミル ヘンドウ ソウカン ノ ガイヨウ
Title Alternative (English)
Time Series Analysis of the Salinity of Shinjiko Lake and Related Hydrological Observations(I) : Abstructs of the Variations and Correlations by Monthly Observations
File
language
jpn
Author
Takeyama, Kouichi
Tanaka, Reijiro
Chikasige, Fumio
Description
This paper investigated the characteristics of time series of the salinity(chloineion) at Shinjiko Lake, wich is under construction of refreshing water, for the surrounding area has been caused many drought damage by the intrusion of saltywater from Nakaumi Lake since 1922.
This refreshing water was planned to use for newly reclaimed land and the existing farmland.
The salinity has been mesaured once or twice by month since 1972 to 1981, and their variations and correlations with related hydrological observations such as rain, streamflow and sea level were examined. Moreover the probability of nonexceedance of the salinity for paddy field was examined.
Correlogram and spectrum of streamflow showed the periodicity of 3~6 months than that of 1 year, and the effect of markov chain. The salinity had little periodicity, while the variation as markov chain was shown.
The most effectual factor to the salinity is the sea level of Japan Sea, which rises up in Summar(this season has many dearth of water), and falls down in winter(this season has much water with much snow). And from winter to summer, the salinity decreased, on the contrary from spring to fall it mostly increased, for the annual tidal range of mean monthly level is 0.4 meters but tidal range in a day is only 0.2 meters in this area.
The probability of nonexceedance of the salinity showed that the water could not be used even for rice paddy field in this condition. Because this sample even at the upper lawyer(1 meter depth) and near the entrance of Hi River showed that the probability of that use was about 20% in irrigation period.
Journal Title
Bulletin of the Faculty of Agriculture, Shimane University
Volume
18
Start Page
143
End Page
149
ISSN
0370940X
Published Date
1984-12-20
NCID
AN00108015
Publisher
島根大学農学部
Publisher Aalternative
Shimane University, Faculty of Agriculture
NII Type
Departmental Bulletin Paper
OAI-PMH Set
Faculty of Life and Environmental Science
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