Study on development of water quality evaluation method using near-ultraviolet photo image by digital camera

Research Project

Project/Area Number	25660193
Research Category	Grant-in-Aid for Challenging Exploratory Research
Allocation Type	Multi-year Fund
Research Field	Rural environmental engineering/Planning
Research Institution	Osaka Prefecture University
Principal Investigator	Nakagiri Takao 大阪府立大学, 生命環境科学研究科(系), 准教授 (80301430)
Co-Investigator(Kenkyū-buntansha)	HORINO Haruhiko 大阪府立大学, 生命環境科学研究科, 教授 (30212202) SAKURAI Shinji 大阪府立大学, 生命環境科学研究科, 助教 (30531032)
Project Period (FY)	2013-04-01 – 2016-03-31
Project Status	Completed (Fiscal Year 2015)
Budget Amount *help	¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000) Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000) Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000) Fiscal Year 2013: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywords	デジタルカメラ / 近紫外 / デジタル画像 / 水質評価 / COD / ソフト開発 / ため池 / 近紫外画像 / 吸光度 / 蛍光光度 / ソフトウェア開発
Outline of Final Research Achievements	This study clarified the possibility of quantitative water quality evaluation, especially COD, using a near-ultraviolet digital photo image (JPG format) of the surface of closed water area such as a irrigation pond taken by a commercially available digital camera with a band pass lens filter which can pass the light in a specific wavelength range 340-360 nm. Furthermore, this study investigated improvement of the evaluation accuracy. In this study, an application software was also developed, which estimate the water quality from a near-ultraviolet photo image, display evaluation result, and is also very easy to operate even by inexperienced persons in digital equipment.