|
The Los Angeles flood of 1938 was responsible for inundating much of Los Angeles, Orange, and Riverside counties, California during February and March 1938. The flood was caused by a pair of Pacific storms that swept inland across the Los Angeles Basin, causing abnormally high rainfall across much of coastal Southern California. Between 113〔 〕 to 115 people were killed in what ultimately became one of the most catastrophic natural disasters in Southern California history.〔(【引用サイトリンク】title=Los Angeles Basin's 1938 Catastrophic Flood Event )〕 The flood caused the Santa Ana, Los Angeles, and San Gabriel Rivers to burst their banks, washing away roads, bridges, and buildings, and stranding hundreds of people. Damages in parts of Los Angeles County were moderated by dams in the San Gabriel Mountains, while Orange and Riverside Counties took more damage because of the lack of flood-control works in the Santa Ana River system.〔 The flooding event of 1938 is considered a 50-year flood. It resulted in $40 million of damages, and the Red Cross deemed it the "fifth largest flood in history".〔 In response to the floods, the U.S. Army Corps of Engineers began channelizing local streams and building more flood control dams. Dams built in the aftermath of the flood include Sepulveda Dam, Hansen Dam, Prado Dam, and Whittier Narrows Dam, which hydrologically connects the San Gabriel River to the Rio Hondo. These works have been instrumental in protecting coastal Southern California from subsequent flooding events, although the storms of 1969 and 2005, which had larger volume than the 1938 flood, still caused major damage and forced the evacuation of low-lying areas.〔 ==Background== Between February 27 and 28, 1938, a storm from the Pacific Ocean moved inland into the Los Angeles Basin, running eastward into the San Gabriel Mountains. The area received almost constant rain totaling from February 27-March 1. This caused minor flooding that affected only a few buildings in isolated canyons and some low-lying areas along rivers.〔 Fifteen hours later on March 1, at approximately 8:45 PM, a second storm hit the area, creating gale-force winds along the coast and pouring down even more rain. The storm brought rainfall totals to in the lowlands and upwards of in the mountains. When the storm ended on March 3, the resulting damage was horrific.〔 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「Los Angeles flood of 1938」の詳細全文を読む スポンサード リンク
|