River Water Quality of Dairy Farming Area in Eastern Hokkaido
River Water Quality of Dairy Farming Area in Eastern Hokkaido
复制标题
道东奶牛场河流水质
DOI：
10.3178/jjshwr.8.267
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
T. Muneoka
中科院分区：
文献类型：
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作者：
T. Nagasawa;Takashi Inoue;Y. Umeda;T. Muneoka
对日本北海道东部奶牛养殖区河流水质现状进行了研究。从水环境保护的角度出发，对土地利用进行了应有的考虑。5个流域的河水浓度呈现出以下趋势：[天然河道的森林流域] < < [天然河道的奶牛养殖流域] < [人工河道的奶牛养殖流域]。值得注意的是，在奶牛场流域中，总氮的80%以NO3-N的形式存在，且在牛密度较大的流域中NO3-N的浓度较高，表明NO3-N存在明显的淋溶现象。人口稠密的流域牛也显示严重的水污染之间的关系，河流流量和浓度。在同一水平牛群密度下，人工河道的浓度高于天然河道。河岸林和湿地带的缓冲过滤功能得到了肯定。由此可见，流域开发和养殖规模的扩大不仅受养殖规模和经营条件的影响，而且还受流域河道条件和土地利用的影响。提出了河流环境保护方向的概念，用两个轴分别对应负荷的输入和输出。
The present state of river water quality of dairy farming area in eastern part of Hokkaido, Japan, was studied. From standpoint of water environment conservation, some consideration was made to the landuse as it ought to be. River water concentrations of 5 river basins show following tendency; [Forest basin with natural river channel] < < [Dairy farming basin with natural river channel] < [Dairy farming basin with artificial river channel]. It is remarkable that 80% of total nitrogen take form of NO3-N in dairy farming basins, and that the concentration is higher in basin of large cattle population density per pasture, which suggests the apparent evidence of NO3-N eluviation. Densely populated basin of cattle also shows severe water pollution in relation between river flow and concentration. Artificial river channel indicates higher concentration than that of natural river channel on same level density of cattle population. The function of riparian forest and wetland zones as buffer filter is confirmed. From the fact mentioned above, development of river basin and enlargement of farm keeping give impact not only by scale and condition of farm management, but also influences by the condition of river channel and landuse of the basin. The concept about direction of river environment conservation was mentioned using two axes correspond to input and output of load.