Possibility of Using Selected Rainfall-Runoff Models for Determining the Design Hydrograph in Mountainous Catchments: A Case Study in Poland

Dariusz Młyński,Jacek Florek,Leszek Książek,Andrea Petroselli,Andrzej Wałęga

doi:10.3390/w12051450

Dariusz Młyński, Jacek Florek + Show 3 more

Open Access

https://doi.org/10.3390/w12051450

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Journal: Water	Publication Date: May 20, 2020
Citations: 19	License type: CC BY 4.0

Affiliation: University of Agriculture in Krakow, Tuscia University

Abstract

The aim of the study was to analyze the possibility of using selected rainfall-runoff models to determine the design hydrograph and the related peak flow in a mountainous catchment. The basis for the study was the observed series of hydrometeorological data for the Grajcarek catchment area (Poland) for the years 1981–2014. The analysis was carried out in the following stages: verification of hydrometeorological data; determination of the design rainfall; and determination of runoff hydrographs with the following rainfall-runoff models: Snyder, NRCS-UH, and EBA4SUB. The conducted research allowed the conclusion that the EBA4SUB model may be an alternative to other models in determining the design hydrograph in ungauged mountainous catchments. This is evidenced by the lower values of relative errors in the estimation of peak flows with an assumed frequency for the EBA4SUB model, as compared to Snyder and NRCS-UH.

Highlights

Surface runoff is the amount of water that is generated when excess stormwater, meltwater, or other water sources flow over the topographic surface
The purpose of the research was to analyze the possibility of using the EBA4SUB model to determine design hydrographs in mountainous catchments
Considering the obtained results, it was found that this model can be an alternative to commonly used rainfall-runoff models such as Snyder and NRCS-UH

Summary

Introduction

Surface runoff is the amount of water that is generated when excess stormwater, meltwater, or other water sources flow over the topographic surface. It occurs, for instance, when the soil is saturated from above by infiltration, or when the soil is saturated from below by the subsurface flow. Surface runoff often occurs due to impervious areas (such as roofs and others) that do not allow water to soak into the ground. It is the primary agent of soil erosion by water [1,2]. Determining the shape of design hydrographs is a very important activity in flood protection

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