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首页> 外文期刊>Geosciences >Flood Hazard Management in Public Mountain Recreation Areas vs. Ungauged Fluvial Basins. Case Study of the Caldera de Taburiente National Park, Canary Islands (Spain)
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Flood Hazard Management in Public Mountain Recreation Areas vs. Ungauged Fluvial Basins. Case Study of the Caldera de Taburiente National Park, Canary Islands (Spain)

机译：山区公共游乐区与疏ga河床盆地的洪水灾害管理。加那利群岛（西班牙）的破火山口国家公园案例研究

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Las Angustias River is an ungauged stream in the Caldera de Taburiente National Park (Spain), where frequent intense flash-flood events occur. The aim of this research is to analyze the flood hazard at the Playa de Taburiente. Based on the limited information available (short time-series of daily precipitation), a statistical frequency analysis of 24 h rainfall was completed and the precipitation results were transformed into surface runoff. To determine if the model underestimates the flows that are generated in the basin, the dendro-geomorphological information available was used to calibrate results. The results of the HMS model were significantly lower. At this point, both the rainfall data and the rainfall-runoff model were re-analyzed to maximize the rainfall intensity values and the runoff generated (increasing the CN value for the basin). For the 1997 flood event, a 1250 m 3 ·s ?1 flood minimizes the RMSE for the disturbed tree sample; this flow value also clearly exceeds any peak flow derived from the rainfall-runoff analysis. It is only when rainfall intensity and surface runoff are maximized that the peak flows obtained approximate those associated with dendro-geomorphological data. The results highlight the difficulties of flood hazard management in ungauged torrential basins in mountain recreational areas (such as National Parks). Thus, in the absence of flow records, when considering the maximum rainfall intensity scenario may be a useful and effective tool for flood risk management.
机译：Las Angustias河是Caldera de Taburiente国家公园（西班牙）中一条未吞噬的溪流，那里经常发生强烈的洪涝灾害。这项研究的目的是分析塔布里恩特海滩的洪水灾害。基于可用的有限信息（每日降水的短时间序列），完成了对24小时降雨的统计频率分析，并将降水结果转化为地表径流。为了确定模型是否低估了盆地中产生的流量，可利用可用的树突-地貌信息来校准结果。 HMS模型的结果明显较低。此时，重新分析了降雨数据和降雨径流模型，以最大化降雨强度值和产生的径流（增加流域的CN值）。对于1997年的洪水事件，1250 m 3·s？1的洪水使受干扰的树木样本的RMSE最小。该流量值也明显超过了降雨径流分析得出的任何峰值流量。仅当降雨强度和地表径流最大化时，所获得的峰值流量才近似于与树突-地貌数据相关的峰值流量。研究结果突显了山区休闲区（例如国家公园）未洪流的洪泛区的洪水灾害管理困难。因此，在没有流量记录的情况下，当考虑最大降雨强度时，可能是洪水风险管理的有用和有效工具。

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