Flood Studies Update (FSU) Physical Catchment Descriptors (Gauged)

Abstract:
This data shows the metrics derived for the Flood Studies Update (FSU) Programme relating to the gauged catchment outlines. This includes different land uses, soil types, and average annual rainfalls for each ungauged catchment but also metrics regarding the Blueline River Network itself.

These statistics have become what are now known as physical catchment descriptors (PCDs). A PCD describes a characteristic of a catchment as a single number. A list of the most commonly used PCDs in the FSU methodologies are summarised as follows; Catchment Area (AREA), Standard Period Average Annual Rainfall (SAAR), Baseflow Index derived from Soils (BFIsoil), Flood Attenuation from Reservoirs and Lakes (FARL), Drain Density (DRAIND), Mainstream Slope (S1085), Arterial Drainage Index (ARTDRAIN2) and Proportion of Urban Landcover Extent (URBEXT).

Purpose:
The data has been developed to inform the Flood Studies Update (FSU) Programme. The FSU is a programme of research and development, undertaken by the Office of Public Works (OPW), to provide improved methods of extreme rainfall and flood estimation at both gauged and ungauged river locations in the Republic of Ireland.

摘要：
本数据集收录了为洪水研究更新（Flood Studies Update, FSU）计划推导得到的、与实测集水区（gauged catchment）轮廓相关的各类指标。其涵盖了每个无实测集水区（ungauged catchment）的不同土地利用类型、土壤类型及年均降雨量，同时也包含与蓝线河网（Blueline River Network）自身相关的指标。

此类统计指标现已被定义为物理集水区描述符（physical catchment descriptors, PCDs）。PCD以单一数值表征集水区的某一特征。FSU方法体系中最常用的PCD汇总如下：集水区面积（Catchment Area, AREA）、标准期年均降雨量（Standard Period Average Annual Rainfall, SAAR）、基于土壤的基流指数（Baseflow Index derived from Soils, BFIsoil）、水库与湖泊洪水衰减率（Flood Attenuation from Reservoirs and Lakes, FARL）、排水密度（Drain Density, DRAIND）、主河道坡度（Mainstream Slope, S1085）、干道排水指数（Arterial Drainage Index, ARTDRAIN2）以及城市土地覆盖占比（Proportion of Urban Landcover Extent, URBEXT）。

数据集用途：
本数据集旨在为洪水研究更新（FSU）计划提供支撑。FSU是由爱尔兰公共工程办公室（Office of Public Works, OPW）实施的一项研发计划，旨在为爱尔兰共和国境内实测与无实测河道点位提供更精准的极端降雨与洪水估算方法。