The Calibration of Evaporation Models against the Penman–Monteith Equation on Lake Most

Viktor Dubovský,Lukáš Pospíšil,Dagmar Dlouhá

doi:10.3390/su13010313

Viktor Dubovský, Lukáš Pospíšil + Show 1 more

Open Access

https://doi.org/10.3390/su13010313

Copy DOI

Journal: Sustainability	Publication Date: Dec 31, 2020
Citations: 17	License type: CC BY 4.0

Affiliation: Technical University of Ostrava

Abstract

Evaporation is one of the main components of the water cycle in nature. Our interest in free water surface evaporation is due to the needs of ongoing hydric recultivation of the former Ležáky–Most quarry, i.e., Lake Most, and also other planned hydric recultivations in the region. One of the key components of hydric reclamation planning is the securitization of long-term sustainability, which is based on the capability to keep the final water level at a stable level. In our work, we are interested in the evaporation estimation in the area of Lake Most (Czech Republic, Europe). This lake has been artificially created only a few years ago, and nowadays we are looking for a simple evaporation model, based on which we will be able to decide which measurement devices have to be installed at the location to provide more localized data to the model. In this paper, we calibrate state-of-the-art simplified evaporation models against the Penman–Monteith equation based on the Nash–Sutcliffe efficiency maximization. We discuss the suitability of this approach using real-world climate data from the weather station located one km from the area of interest.

Highlights

Evaporation is one of the main components of the water cycle in nature—it is reported that it makes up almost two-thirds of continental precipitation—its measurement or calculation procedures are complicated and burdened with a high degree of uncertainty.The measurement is provided by evaporation pans and class A is widely adopted as the standard pan
The method minimizes the sum of squares of differences between model values and Food and Agriculture Organization (FAO) values divided by a constant (see (20)) and, the differences were minimized and the scatter plots are more clumped around the equality line; see Figures 3–9
We examined and discussed the calibration of selected evaporation models against the Penman–Monteith equation in terms of the Nash–Sutcliffe efficiency maximization

Summary

Introduction

Evaporation is one of the main components of the water cycle in nature—it is reported that it makes up almost two-thirds of continental precipitation—its measurement or calculation procedures are complicated and burdened with a high degree of uncertainty.The measurement is provided by evaporation pans and class A is widely adopted as the standard pan. The uncertainty in computed estimates is due to the complexity of evaporation as a physical phenomenon and several factors that affect this process. (see [4]), computational methods are divided into two classes, namely aerodynamic formulae and energy budget formulae This classification is quite rough and in practice it is hard to distinguish mass transfer factors from energy budget ones. We distinguish whether we are considering a potential (possible) or actual (real) evaporation rate. Both computational methods and measurement methods deal with potential values, which in both cases is because there is an effort to simplify the description. The goal of this work is to deal with the inaccuracy of computed results and their relation with inaccuracy

Objectives

Methods

Results

Discussion

Conclusion