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Green Lake is a natural tidal lake in Calhoun County, Texas, on the Guadalupe River flood basin. Known for its greenish waters, from which its name derives, the lake is located west of Port Lavaca and south of Victoria on the Gulf Coastal Plain. Despite being less than from the coast of San Antonio Bay, its waters are fresh. It is the largest natural freshwater lake entirely in Texas, covering an area of approximately 10,000 acres (40 km²).〔"Texas Independence Trail", p. 98〕 Separated from San Antonio Bay by the Guadalupe River delta around 2,200 years ago, a wetland ecosystem supporting a wide variety of waterfowl developed along the lake shore and the Guadalupe River delta. Archaeological evidence supports claims of Karankawa settlement. An affluent 19th-century agricultural community of the same name established near the lakeside in the mid-19th century, but dwindled in status, becoming virtually abandoned in the aftermath of the American Civil War. It was strategically important during the early stages of the war, due to its proximity to fresh water and the Gulf of Mexico. After reaching its low point during the Great Depression, the lakeside community modestly rebounded in 1947 following the nearby discovery of oil. A fictional lake of the same name and with a similar history is featured in the 1998 novel ''Holes''. ==Hydrology== Green Lake is about in circumference and about wide.〔 The water level is shallower near the shoreline, but is deepest towards the center of the lake several hundred feet from the shore. The bottom is generally flat and averages about in depth. The nearby Guadalupe River frequently floods the plain, and is the main source of fresh water renewal.〔"Welder v. State", p. 869〕 The shoreline is naturally grassy and poorly drained with coastal marshes between the lake and San Antonio Bay.〔 To improve drainage, a levee was constructed in 1967, separating the lake from the Victoria Barge Canal, which runs along the bay's northern and eastern shores; cutting off several bayous from the lake. The canal begins north at an industrial plant outside Victoria and empties in San Antonio Bay in Seadrift. Hog Bayou runs along the western shore of Green Lake, through the Guadalupe Delta Wildlife Management Area to the south, before its confluence with Mission Lake. 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「Green Lake (Texas)」の詳細全文を読む スポンサード リンク
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