| 翻訳と辞書 |
| Harrison Spring ： ウィキペディア英語版 |
Harrison Spring
Harrison Spring is the largest spring in the state of Indiana. It is located in west-central Harrison County, near the Blue River and just north of White Cloud.
==The Spring==
A portion of the water that feeds the spring originates from Indian Creek, and then goes underground until it reaches the spring area. The water percolates through a layer of Pleistocene alluvium cavern (Karst) beneath the surface of the ground and flows into a pool measuring by , about of surface area, and contains of water.〔( Amazing Tales from Indiana By Fred D. Cavinder, 1990, Pg 6 )〕 It is within an abandoned meander loop, and in the periphery a natural levee.〔(NPS: Nature & Science » National Natural Landmarks )〕 Divers have measured its depth to be between 35 and . It produces at least of water a day at an average of 18,000 gpm,〔(Hydrogeology of Harrison County, Pg 15 )〕 enough to supply water to an average town of 12,000.〔( Amazing Tales from Indiana By Fred D. Cavinder, 1990, Pg 5 )〕 On rainy days the spring can produce as much as of water a day.〔''Harrison Spring bubbling with history of our ninth president'' Louisville Courier Journal April 2, 1978〕 The water from the spring overflows into an outlet that travels about half a mile before merging with Blue River as a tributary.
The spring is similar to many other springs around the Lost River, a large underground river that flows through Indiana roughly parallel to the Ohio River, and may be one of its several outlets. The spring is located at the low point of a subterranean gradient that the Indian Creek flows over at a higher point. Dye tests have shown that water can percolate through the karst from Indian Creek to Harrison Spring, a four-mile (6 km) distance, in as little as four hours.〔 The spring is also linked with the Wyandotte Caves, the largest cave system in the state, whose main entrance is about five miles (8 km) west of the spring.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Harrison Spring」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|