Research on groundwater flow systems using the concentration of anions

利用阴离子浓度研究地下水流系统

基本信息

批准号：
03453169
负责人：
SUZUKI Yuichi
金额：
$ 3.78万
依托单位：
Univ.Tsukuba
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1993
项目状态：
已结题

项目摘要

The studies on groundwater flow system by using the concentrations of anion were carried out. The fields of studies are four areas ; Mt.Yatsugatake, the fluvial fan around the city of Gosen, the fluvial fan in the Nasunogahara, and Mt.Tsukuba.On the mountain slope of Mt.Yatsugatake, the high concentration area of HCO^<3-> and SiO_2 are found at the lower part of the slope, and groundwater in this area is considered that the residence time is large. The concentration of NO^<3-> is an indicator of pollution by fertilizer, and from the comparison of land use map, the polluted water is distributed in the area of farm or pasture, not paddy field.In the Gosen area, the stream lines of groundwater recharged by the Hayatuki River were estimated by the mapping of water qualities, and the lines are coincide with the lines extimated from the geological structure.From the results of the observations in the Nasunogahara, the shallow groundwater is polluted by the excrement of domestic animals, and the pollutant, for example NO^<3->, flows on the same route of the groundwater.On the slope of Mt.Tsukuba, the base flow were sampled and analyzed. The water quality changes remarkably in space, i.e., the concentration of samples of eastern part of the mountains are low and those of western part are high. These differences were caused by the differences of the weathering of rocks.From the results of field observations, there are some remarkable spatial changes in water quality of groundwater, especially in the concentration of anion. These spatial differences are useful to estimate the groundwater flow patterns or systems.The author will make plan for the study on the changes in water quality, especially in anion, to the downstream along the stream line.

使用阴离子的浓度对地下水流系统进行研究。研究领域是四个领域。 Mt.yatsugatake mt.yatsugatake，周围是高森市周围的河扇，nasunogahara的河扇和山顶。 NO^<3->的浓度是肥料污染的指标，并且从土地使用图的比较中，污染的水分布在农场或牧场区域，而不是帕迪领域，而不是帕迪领域。在GOSEN区域中，由Hayatuki River的地下水界线通过Hayatuki River估算了地下水，并通过杂志的绘制来估计，这些线路是一致的。在Nasunogahara中，浅层地下水受到家畜的粪便污染，例如污染物，例如没有^<3->，在地下水的相同途径上流动。在Mt.tsukuba的斜坡上，对基本流量进行了采样和分析。水质在太空中发生了明显变化，即山区东部的样品浓度很低，西部的样品浓度很高。这些差异是由岩石风化的差异引起的。从田间观测结果，地下水的水质存在显着的空间变化，尤其是在阴离子的浓度下。这些空间差异对于估计地下水流量模式或系统很有用。