Genesis of sediments and their functions for nutrient cycling in the tropical dam reservoir

2014 Fiscal Year Final Research Report

• Project/Area Number: 25660149
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Aquatic bioproduction science
• Research Institution: National Institute for Environmental Studies
• Principal Investigator: MURATA Tomoyoshi 独立行政法人国立環境研究所, 地域環境研究センター, 主任研究員 (50332242)
• Co-Investigator(Renkei-kenkyūsha): HIROKI Mikiya 独立行政法人国立環境研究所, 生物・生態系環境研究センター, 主任研究員 (40142103) ; TOMIOKA Noriko 独立行政法人国立環境研究所, 地域環境研究センター, 主任研究員 (40168399) ; FUKUSHIMA Michio 独立行政法人国立環境研究所, 生物・生態系環境研究センター, 主任研究員 (10291048)
• Research Collaborator: JUTAGATE Tuantong Ubon Ratchathani University, Associate Professor ; UTSUGAWA Toru カテナ研究所, 所長
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 底質 / 熱帯 / ダム貯水池 / 栄養塩 / 循環

Outline of Final Research Achievements

The objective of this study is to clarify the following issues regarding bottom environments in dam reservoirs in Lower Mekong River Basin(LMB): 1) sedimentation process, especially of phosphorus and 2) functional evaluation of reaction states for nutrient cycles such as phosphorus.Inorg- and Org-P are correlated to clay and Fe oxide contents, probably through the adsorption of P constituents onto the surface of clay and/or Fe oxides. Especially, lakeshores of Tonle Sap had high Inorg-P, owing to human activity in riparian villages.

Free Research Field

土壌学