武蔵野台地の湧泉の水循環解析と流域管理

抄録

Hydrological cycle of the Kokubunji experimental basin in the Musasino upland was studied at the spring in the Kokubunji-manyo garden in relation to the applicability of the hourly concentrated hydrological model and the basin management by means of the houses infiltration facilities. The hydrological model can also be considered the surface infiltration capacity of the pervious area. The analyses were carried out for two years hydrological data in 1992 and 1993, in which the sewer system had been expanded and the inverting wells became scarcely used.
The results indicated that the model generally reproduced observed runoff hydrographs, and the model applicability was confirmed. We also predicted the simulated hydrographs of which the assumption that the houses infiltration facilities were introduced, using the above hydrological model. It is found that the houses infiltration facilities are important for managing a basin in respect of the springs conservation.