Dynamic conservation mechanism of temporal water area and its roles in preservation of riparian ecosystem

时域水域动态保护机制及其在河岸生态系统保护中的作用

基本信息

批准号：
14350264
负责人：
TSUJIMOTO Tetsuro
金额：
$ 6.72万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
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)Formation process of "Wando" backwaterWe conducted field research at "Wando" backwater, which is an embayment opening to main river channel, at Kiso river's a series of grolyns. as the example case with tidal effect in downstream area. Two scale geography, one is large scale including main Wando's scouring and the other is sub channel in deposition area in smaller scale by field research, literature research, and numerical simulations.It is explained main depression at Wando is formed under flood, by bed load transport affected by of vegetation area's expansionsAnd subchannels are formed by daily tidal motion of sediment on deposition area of sand. Additionally, these channels take an important role to supply different water quality to Wando area from sand substrate during ebb-tide stage.(2)Water quality in backwater and subsurface waterWater movement in subsurfacewater surrounding backwater, i.e. Wando, pond, are significant for mechanisms of water quality formation. Field research and numerical simulation shows that subsurface flow is change by the existence of backwater and accelerated.In sandbar, water quality, especially in Nitrogen, of subsurface water is changed by both by denitrification and supply from surface layer, which include organic matter.(3)Growth and detachment of algaeWhen we consider water quality in backwater, the effects by argae production is important. We conducts field experiment and laboratory experiment on algae's production, competition between filamentous and non-filamentous periphyton, and debouchments. Additionaly, we made numerical simulation model on algae competition

（1）“ Wando” Backwaterwe的形成过程在“ Wando” Backwater进行了现场研究，该研究是Kiso River的一系列格罗恩斯（Kiso River）的一系列格罗恩斯（Kiso River）的嵌入开口。作为在下游区域具有潮汐效应的示例。 Two scale geography, one is large scale including main Wando's scouring and the other is sub channel in deposition area in smaller scale by field research, literature research, and numerical simulations.It is explained main depression at Wando is formed under flood, by bed load transport affected by of vegetation area's expansionsAnd subchannels are formed by daily tidal motion of sediment on deposition area of sand.此外，这些通道在退潮阶段的砂底物中为旺多区域提供不同的水质。（2）（2）背水和地下水的水质周围的背水水质，即wando，pond，池塘，对于水质形成的机制是重要的。现场研究和数值模拟表明，在砂巴的存在下，地下流动正在改变。在桑巴尔，水质，尤其是在氮中，地下水的质量和从表面层中的供应都改变了地下水，这些硝化和供应包括有机物。（3）包括Algaewhen的生长和水质的生产。我们对藻类的生产，丝状和非丝状周围的竞争以及振动进行现场实验和实验室实验。另外，我们在藻类竞争上制作了数值模拟模型