STUDY ON SALINITY INTRUSION IN ESTUARY OF KOYOSHI RIVER

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  • 子吉川河口域で発生する塩分遡上に関する検討
  • コヨシガワ カコウイキ デ ハッセイ スル エンブン ソジョウ ニ カンスル ケントウ

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Abstract

<p> Supply of water use as the agriculture water was formed mainly in the Koyoshi River. The Honjo plain field was known as production area creationg high quality rice. In addition, there were fewer rations than agriculture, but is used as water service and water for industrial use elsewhere. However, salinity intrusion was occurred by drought in the Koyoshi River. Distanve of salinity intrusion was from the river mouth to nearly 10 km. It cannot pump up water at Yurihonjo City Koyoshi distinct by salinity intrusion. Therefore, it was grasping to the situation about going up of the salt water and it is very important to examine a condition of the going up.</p><p> In the study, it was examined salt going up and relations with external force such as river discharge, the wave height, etc., for the Koyoshi River. Koyoshi River was first-grade river in Akita Prefecture. As a result, it was able to confirm that salinity intrusion was frequent in the Koyoshi a clear relationship was not seen about wave height and the salinity intrusion.</p>

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