A Multi-Platform Hydrometeorological Analysis of the Flash Flood Event of 15 November 2017 in Attica, Greece

被引：66

作者：

Varlas, George ^{[1
,2
]}

Anagnostou, Marios N. ^{[3
,4
,5
]}

Spyrou, Christos ^{[1
]}

Papadopoulos, Anastasios ^{[2
]}

Kalogiros, John ^{[3
]}

Mentzafou, Angeliki ^{[2
]}

Michaelides, Silas ^{[6
]}

Baltas, Evangelos ^{[5
]}

Karymbalis, Efthimios ^{[1
]}

Katsafados, Petros ^{[1
]}

机构：

[1] HUA, Dept Geog, Athens 17671, Greece

[2] HCMR, Inst Marine Biol Resources & Inland Waters, Anavyssos 19013, Greece

[3] IERSD, Natl Observ Athens, Athens 15236, Greece

[4] Ionian Univ, Dept Environm Sci, Zakynthos 29100, Greece

[5] NTUA, Sch Civil Engn, Dept Water Resources, Athens 10682, Greece

[6] Cyprus Inst, 20 Konstantinou Kavafi Str, CY-2121 Nicosia, Cyprus

来源：

REMOTE SENSING | 2019年 / 11卷 / 01期

基金：

美国国家航空航天局;

关键词：

XPOL radar; GPM; IMERG; WRF-Hydro; CHAOS; hydrometeorology; flash flood; Mandra; QUANTITATIVE PRECIPITATION ESTIMATION; DUAL-POLARIZATION RADAR; WAVE MODELING SYSTEM; X-BAND RADAR; PERFORMANCE EVALUATION; FORECASTING SYSTEMS; RAINFALL ESTIMATION; CYCLONE XAVER; RESOLUTION; AREA;

D O I：

10.3390/rs11010045

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Urban areas often experience high precipitation rates and heights associated with flash flood events. Atmospheric and hydrological models in combination with remote-sensing and surface observations are used to analyze these phenomena. This study aims to conduct a hydrometeorological analysis of a flash flood event that took place in the sub-urban area of Mandra, western Attica, Greece, using remote-sensing observations and the Chemical Hydrological Atmospheric Ocean Wave System (CHAOS) modeling system that includes the Advanced Weather Research Forecasting (WRF-ARW) model and the hydrological model (WRF-Hydro). The flash flood was caused by a severe storm during the morning of 15 November 2017 around Mandra area resulting in extensive damages and 24 fatalities. The X-band dual-polarization (XPOL) weather radar of the National Observatory of Athens (NOA) observed precipitation rates reaching 140 mm/h in the core of the storm. CHAOS simulation unveils the persistent orographic convergence of humid southeasterly airflow over Pateras mountain as the dominant parameter for the evolution of the storm. WRF-Hydro simulated the flood using three different precipitation estimations as forcing data, obtained from the CHAOS simulation (CHAOS-hydro), the XPOL weather radar (XPOL-hydro) and the Global Precipitation Measurement (GMP)/Integrated Multi-satellitE Retrievals for GPM (IMERG) satellite dataset (GPM/IMERG-hydro). The findings indicate that GPM/IMERG-hydro underestimated the flood magnitude. On the other hand, XPOL-hydro simulation resulted to discharge about 115 m(3)/s and water level exceeding 3 m in Soures and Agia Aikaterini streams, which finally inundated. CHAOS-hydro estimated approximately the half water level and even lower discharge compared to XPOL-hydro simulation. Comparing site-detailed post-surveys of flood extent, XPOL-hydro is characterized by overestimation while CHAOS-hydro and GPM/IMERG-hydro present underestimation. However, CHAOS-hydro shows enough skill to simulate the flooded areas despite the forecast inaccuracies of numerical weather prediction. Overall, the simulation results demonstrate the potential benefit of using high-resolution observations from a X-band dual-polarization radar as an additional forcing component in model precipitation simulations.

引用

页数：31

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