栃木县良友地区水文地质特征
THE JOURNAL OF THE JAPANESE ASSOCIATION OF GROUNDWATER HYDROLOGY
Pub Date : 1900-01-01
DOI:10.5917/jagh1959.25.183
引用次数: 0
摘要
本文根据东京地区国际工商局在1975年、1979年、1981年进行的地下水合理利用调查和1974年东京市区水力学和水文地质综合调查，介绍了枥木县龙友地区的水文地质特征。本文总结如下:1. 调查区域由山地、丘陵、高原和低地组成，从周边山区向关东平面中心依次排列。2. 这些山脉由花岗岩、火山岩和古生代地层等固结硬岩组成。除山脉外，其余地区均由第三系和第四系等松散地层组成。3.上述松散地层是在由固结岩组成的不透水基底上不整合形成的，可分为“f”~“A”等6个地层。4. 一种不透水的基底形式表明，在太田观测井的两侧存在两个充满废物的山谷。其中一个被铃木昭夫博士称为“kinuawa废物填充谷”。据估计，在宇都宫山的延伸处有一座山。5. 研究区地下水热梯度可分为三类。Tone河南部的热梯度为1℃/100 m, Tone河北部的热梯度为3℃/100 m。此外，Watarase盆地的温度为5°C/100 m。6. 地下水水质在键图上随地层深度的不同，呈现出CaSO4型和Ca (HCO3)型的不同特征。受地下地下水影响的区域钠离子浓度可能较高。虽然上述结果是研究的结果，但还需要对地下水的热梯度差异和某一类地下水进行古地理研究。日本日化株式会社本文章由计算机程序翻译，如有差异，请以英文原文为准。
Hydrogeological Features of Ryomo Area in Tochigi Prefecture
This paper presents some hydrogeological features of Ryomo area in Tochigi Prefecture, based on the investigation for an appropriate usage of groundwater (1975, 1979, 1981) and the integrated investigation of hydraulics and hydrogeology in Tokyo urban area (1974) which were carried out by Tokyo Regional Bureaw of International Trade and Industry.
This paper is summarized as follows ;
1. The investigated area consists of mountains, hills, plateaus and lowlands, which are put in order from surrounding mountainous area towards a center of Kanto-plane.
2. The mountains comprise consolidated hard rocks such as granitic rocks, volcanic rocks and Paleozoic formations. The area except the mountains is composed of unconsolidated formations such as Tertiary and Ouaternary system.
3. The above unconsolidated formations results unconformably upon the impervious basement comprising the consolidated rocks and are divided into six formations such as formation“F”to forma ion &l”quo;A".
4. A form of the impervious basement indicates existence of two waste-filled valleys at both sides of the Ota observation well. One of them was called “Kinugawa waste-filled valley”by Dr. Akio Suzuki. And it is estimated that a hill lies in the gound at the extention of the Utsunomiya hill.
5. The thermal gradient of groundwater is divided into three groups in the investigated area. The thermal gradient is 1°C/100 m in south of Tone river and is 3°C/100 m in north of Tone river. Further, it is 5°C/100 m in the Watarase basin.
6. Groundwater quality varies from CaSO4 type to Ca (HCO3) type on the Key-diagram correspondent with a depth of respective formations. And it is likely thet there is a higher concentration in sodium ion in the area where is affected by groundwater of the basement.
Although above mentioned results were led from the study, further, a palaeogeographicai study is required on difference of the thermal gradient of groundwater and on a type of groundwater. 株式会社 日さく NISSAKU CO., LTD
This paper is summarized as follows ;
1. The investigated area consists of mountains, hills, plateaus and lowlands, which are put in order from surrounding mountainous area towards a center of Kanto-plane.
2. The mountains comprise consolidated hard rocks such as granitic rocks, volcanic rocks and Paleozoic formations. The area except the mountains is composed of unconsolidated formations such as Tertiary and Ouaternary system.
3. The above unconsolidated formations results unconformably upon the impervious basement comprising the consolidated rocks and are divided into six formations such as formation“F”to forma ion &l”quo;A".
4. A form of the impervious basement indicates existence of two waste-filled valleys at both sides of the Ota observation well. One of them was called “Kinugawa waste-filled valley”by Dr. Akio Suzuki. And it is estimated that a hill lies in the gound at the extention of the Utsunomiya hill.
5. The thermal gradient of groundwater is divided into three groups in the investigated area. The thermal gradient is 1°C/100 m in south of Tone river and is 3°C/100 m in north of Tone river. Further, it is 5°C/100 m in the Watarase basin.
6. Groundwater quality varies from CaSO4 type to Ca (HCO3) type on the Key-diagram correspondent with a depth of respective formations. And it is likely thet there is a higher concentration in sodium ion in the area where is affected by groundwater of the basement.
Although above mentioned results were led from the study, further, a palaeogeographicai study is required on difference of the thermal gradient of groundwater and on a type of groundwater. 株式会社 日さく NISSAKU CO., LTD
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