Effects of Urbanization on Groundwater Run-off of Small Rivers in Tama Hilly Land

THE JOURNAL OF THE JAPANESE ASSOCIATION OF GROUNDWATER HYDROLOGY Pub Date : 1900-01-01 DOI:10.5917/JAGH1959.21.91

Y. Ando

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Abstract

This paper is a study on effects of urbanization on gronndwater runoff of small rivers in Tama Hilly Land . In winter, the authors observed groundwater discharge of small rivers in Tama Hilly Land.
The basins of five rivers are natural and those of four rivers are urbanized From results of the observation, it was made clear that groundwater discharges of urbanized rivers were less than those of natural rivers, and volume of groundwater discharge of urbanized rivers depended on hydro--geological structure . 1まえがき 1960年以降,大都市近効の丘陵地や台地では急激に都市化が進行した.この都市化の進行の過程で,各地に都市水害が頻発し,都市化による洪水流出の変化が問題とされ,その方面の研究の蓄積は着実に進んでいる.一方,近年,都市化しても,下流の農業用水を確保する必要性や,都市内の小河川を保全するために環境維持用水を確保する必要性などから,小河川の地下水流出に対する都市化の影響の評価も現実的な重要性が高まっている.ところが,この方面の研究はほとんどないのが現状である◎ そこで,筆者らは,多摩ニュータウンによる大規模な都市化が進行中の多摩丘陵の西部の小河川を対象にして,地下水流出に対する都市化の影響について調査,研究を行なうことにした.

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城市化对多摩丘陵小河流地下水径流的影响

This paper is a study on effects of urbanization on gronndwater runoff of small rivers in Tama HillyLand . In winter，the authors observed groundwater discharge of small rivers in Tama Hilly Land. the basins of five自然与those of four rivers are urbanized From results of the observationit was made clear that groundwater discharges of urbanized rivers were less than those of naturalrivers,groundwater discharge of urbanized rivers depended on hydro——geological structure . 11960年以后，大城市附近的丘陵和台地急剧城市化。在城市化进程中，各地城市水灾频发，城市化导致的洪水流出变化被认为是问题，在这方面的研究积累正在稳步推进。另一方面，近年来，由于确保下游农业用水的必要性，以及为了保护城市内的小河，确保环境维持用水的必要性等，对小河川的地下水流的城市化影响的评价在现实中的重要性也在提高。实际上，这方面的研究目前还没有进展。因此，作者们在多摩新城的大规模城市化进程中的多摩丘陵以西部的小河流为对象，对城市化对地下水流出的影响进行调查和研究。

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THE JOURNAL OF THE JAPANESE ASSOCIATION OF GROUNDWATER HYDROLOGY

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