2013 Fiscal Year Final Research Report
Evaluation Procedures for Diffuse Pollution Measures using GIS with Topological Data Model
| Project/Area Number |
22360215
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Civil and environmental engineering
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| Research Institution | Tottori University |
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Principal Investigator |
MASUDA Takanori 鳥取大学, 工学(系)研究科(研究院), 准教授 (20293897)
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| Project Period (FY) |
2010-04-01 – 2014-03-31
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| Keywords | GIS / ノンポイント汚染 / 水田 |
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| Research Abstract |
To evaluate various countermeasures for diffuse pollution from irrigation fields, some procedures were developed for making topology dataset from existing elevation data and geographical data in GIS. The procedures could identify the topological spatial relationships between geographical objects including rivers, drainage canals, agricultural irrigation fields, water intake and effluent facilities and observation stations for flow rate and water quality using the coordinate and elevation of the objects, and make topology dataset to use pollution runoff models. Evaluation of influences on runoff volume and pollutant amount were conducted based on the procedures using several type of existing geographical dataset having different spatial accuracy. From the analysis using specific pollutant coefficients made from field runoff observations with different time intervals, estimation of pollutant amount during irrigation season were several times higher according to the observation intervals.
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