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Dive into the research topics where Kenichi Koga is active.

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Featured researches published by Kenichi Koga.


Doboku Gakkai Ronbunshu | 2002

A VALIDATION AND DESIGN FACTORS IN A TEST PLANT OF WATER PURIFICATION SYSTEM USING THE “SARUBOU” SHELL

Yasunari Matsuo; Hiroyuki Araki; Kenichi Koga

本研究は, 水域直接浄化システムの基礎的研究で基本特性を明らかにしたサルボウ貝殻 (水産加工場からの未利用資源) を接触材に用いた水質浄化システムの実用化を目指して, 河川水質浄化に関する実証実験を行い, 処理水質の安定性, 浄化特性, 維持管理について検討を行ったものである. その結果, 本水質浄化システムは, BOD, SS, NH4-N, 透視度に対し, 長期にわたり安定した高い浄化能力を有しており, 容易にメンテナンスを行うことができることが分かった. さらに, 本報では河川浄化施設の処理性能を負荷で評価することにより, 浄化機構を考慮した適切な設計手法について提案し, 本施設の操作因子について考察した.


Marine Ecology Progress Series | 2006

Tidal resuspension of microphytobenthic chlorophyll a in a Nanaura mudflat, Saga, Ariake Sea, Japan : flood-ebb and spring-neap variations

Chul-Hwan Koh; Jong Seong Khim; Hiroyuki Araki; Hiroyuki Yamanishi; Hiroyuki Mogi; Kenichi Koga


Environmental Earth Sciences | 2005

Simulation of groundwater flow and environmental effects resulting from pumping

Nguyen Cao Don; Hiroyuki Araki; Hiroyuki Yamanishi; Kenichi Koga


Estuarine Coastal and Shelf Science | 2007

Within-day and seasonal patterns of microphytobenthos biomass determined by co-measurement of sediment and water column chlorophylls in the intertidal mudflat of Nanaura, Saga, Ariake Sea, Japan

Chul-Hwan Koh; Jong Seong Khim; Hiroyuki Araki; Hiroyuki Yamanishi; Kenichi Koga


Environmental Earth Sciences | 2006

Groundwater resources management under environmental constraints in Shiroishi of Saga plain, Japan

Nguyen Cao Don; Nguyen Thi Minh Hang; Hiroyuki Araki; Hiroyuki Yamanishi; Kenichi Koga


Environmental Earth Sciences | 2006

Salinization processes in an alluvial coastal lowland plain and effect of sea water level rise

Nguyen Cao Don; Nguyen Thi Minh Hang; Hiroyuki Araki; Hiroyuki Yamanishi; Kenichi Koga


Agricultural Water Management | 2006

Groundwater resources and management for paddy field irrigation and associated environmental problems in an alluvial coastal lowland plain

Nguyen Cao Don; Nguyen Thi Minh Hang; Hiroyuki Araki; Hiroyuki Yamanishi; Kenichi Koga


Proceedings of the Japan Society of Civil Engineers | 1980

GRAVITY THICKENING OF SLUDGE

Tetsuya Kusuda; Kenichi Koga; Youichi Awaya


Water Science and Technology | 1990

Intermittent aeration for nitrogen removal in small oxidation ditches.

Hiroyuki Araki; Kenichi Koga; Katsuto Inomae; Tetsuya Kusuda; Youichi Awaya


Water Science and Technology | 1987

Nitrogen Removal in an Oxidation Ditch with Intermittent Aeration

Katsuto Inomae; Hiroyuki Araki; Kenichi Koga; Youichi Awaya; Tetsuya Kusuda; Yasunari Matsuo

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Katsumi Moriyama

Kyushu Kyoritsu University

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