地域観光資源の 多言語解説文データベース

How old is the rainwater that feeds Beppu’s hot springs?

Beppu’s hot springs are fed primarily by rainwater that has soaked into the ground. This water collects in natural aquifers as groundwater and is later heated by magma before it rises to the surface. The entire rain-to-spring cycle takes about 50 years, so the hot spring water you see now fell as rain roughly half a century ago.

To ensure groundwater will be available to feed the local hot springs for many years to come, both Beppu and Umi Jigoku management have taken measures to protect a healthy rain-to-spring cycle. The city has begun paving roads with a material that allows rainwater to readily seep through to the ground. At Umi Jigoku, the neighboring forested slopes are preserved in a natural state to prevent excess runoff, facilitating the storage of rain as groundwater.

別府的溫泉水是多久以前的雨水？

別府的溫泉水主要來自滲入地下的雨水，雨水匯集在天然含水層中形成地下水，受岩漿加熱後上升到地表便是溫泉。由雨水到泉水，完成整個水循環大約需要50年，所以今天的溫泉水是差不多半個世紀前的雨水。

為確保當地溫泉水源的永續供給，別府市和海地獄管理單位採取了許多措施來保護「雨水—泉水」的健康循環。如今別府市已將路面替換成更利於雨水下滲的材料。海地獄附近的森林坡地都保持原生自然狀態，防止地下水過度流失，以求最大限度地保存雨水。

别府的温泉水是多久以前的雨水？

别府的温泉水主要来自渗入地下的雨水。雨水汇集在天然含水层中形成地下水，再受岩浆加热、上升到地表后便是温泉。由雨到泉，完成整个循环大约需要50年，所以今天的温泉水是大约半个世纪前的雨水。

为确保本地温泉水源的可持续供给，别府市和海地狱管理方采取了许多措施来保护“雨—泉”循环的健康运行。如今别府市已将路面替换成更利于雨水下渗的材料。海地狱附近的森林坡地都保持原生自然状态，防止地下水过度流失，以求最大限度地保存雨水。