Regional Ecosystem Modeling and Assessment of Near-Natural Engineering for Irrigation and Drainage Canals and Irrigation Ponds

灌溉排水渠和灌溉池塘的近自然工程的区域生态系统建模和评估

基本信息

批准号：
14560205
负责人：
ICHION Eiji
金额：
$ 2.18万
依托单位：
Ishikawa Agricultural College
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

项目摘要

1.The studies in the irrigation and drainage canals in the alluvial fan of the Tedori river and the area around the Khokugata, Ishikawa, Japan, suggested that flow velocities and relevant factors such as water temperatures and sediment thickness have an impact on the diversity and the distribution of aquatic creatures in the canals. Then, another study on benthic animals in small canals, suggested that the species richness of benthic animals correlate closely with the diversity of flow velocities. The studies revealed the importance of increasing the diversity of flow velocities in canals and improving fish-ways at drop structures, in order to maintain the biodiversity in irrigation and drainage canals.2.Mass balance of nutrients in the Higashiike, Minakuchi town, Shiga Prefecture, was discussed. The study suggested that 7.5% of nitrogen and 30% of phosphorus in inflow are accumulated in the pond and 70% of phosphorus accumulated in the pond is fixated by phytoplankton.3.Effectiveness of fish ponds (0.5m depth and 20m length) constructed at intervals of 500m, at the base of the Ohe Drainage Canal, Aichi Prefecture, was examined. The studies suggested that (i) the fish pool provides habitat for fishes particularly when irrigation was not being done, (ii)it is not easy for small fishes to migrate from one fish pond to another fish pond, and (iii) flow velocities in fish ponds are not small during the irrigation period According to the results, installation of fish-shelter-blocks and conservation of aquatic plants were proposed in addition for the Ohe Drainage Canal.4.The surveys on plankton and chemical properties of water were conducted in the Hangaike at the campus of Gifu University. Based on the survey results, the model for predicting the population movement of plankton was established by using cellular automation. The model showed the possibility for predicting the population movement of plankton by this method.

1.对日本石川县手取河冲积扇及石川县北方地区灌溉排水渠的研究表明，流速及水温、沉积物厚度等相关因素对水体多样性和沉积物厚度有影响。水生生物在运河中的分布。然后，另一项针对小运河底栖动物的研究表明，底栖动物的物种丰富度与流速的多样性密切相关。研究揭示了增加渠道流速多样性和改善落差结构鱼道的重要性，以维持灌溉和排水渠道的生物多样性。2.滋贺县水口町东池养分的质量平衡，进行了讨论。研究表明，进水量中7.5%的氮和30%的磷在池塘中积累，其中70%的磷被浮游植物固定。 3. 鱼塘（0.5m深、20m长）建设的效果在爱知县大河排水渠的底部，以500m的间隔进行了检查。研究表明，（i）鱼池为鱼类提供栖息地，特别是在没有进行灌溉的情况下，（ii）小鱼不容易从一个鱼池迁移到另一个鱼池，以及（iii）水流速度灌溉期鱼塘面积不小。根据研究结果，建议对大河排水渠加设拦鱼区和水生植物养护。 4、浮游生物及化学性质调查水是在岐阜大学校园的半池进行的。根据调查结果，利用细胞自动化技术建立了浮游生物种群运动预测模型。该模型显示了用这种方法预测浮游生物种群运动的可能性。