A new adaptation of linear reservoir models in parallel sets to assess actual hydrological events

Navarro

et al. 2018

Water flows in the hydrosphere through a tangled and tortuous labyrinth of ways that is the hydrological cycle. Flow separation models are an attempt to group such complexity of paths into a few components of flow and storage so as to reflect the overall behaviour of a basin. A new method of analysis and separation of flow components, based on equations of dynamic relations between Linear Reservoirs connected in Parallel (PLR models), is developed in this article. A synthesis of models based on mathematical filter equations is carried out in order to make comparisons with the proposed model. Reference is also made to the methodology of adjustment and calibration of the PLR models based on the recession curves of the real hydrographs. The models are tested with the continuous register of a basin located in the northeast of Spain. The simulations are carried out with two reservoir models (2R models), three reservoirs (3R models) and with a mathematical filter model to compare the results. With the results of the models, flow duration curves (FDCs) and storage duration curves (SDCs) were elaborated, thus allowing assessment of the origin of the water resources of the basin, a guarantee of their regulation and availability, the dynamic storage in the catchment, residence times and other features.

Section: Introductionmentioning

confidence: 99%

New Analysis Method for Continuous Base-Flow and Availability of Water Resources Based on Parallel Linear Reservoir Models

Navarro

et al. 2018

“…Then, to this general scheme, a new model is added that estimates the contribution of water coming from snow reservoirs. Figure 1 shows the interface of the computer program which has been used in recent years in numerous professional works on risks, spatial planning, and civil and architectural works, as well as in scientific publications [47,48,[56][57][58][59][60][61][62][63]. The SHEE software has numerous applications for either DEM management or simulation of hydrological processes [64].…”

Section: Methodsmentioning

confidence: 99%

“…To carry out this work, we start with a flow circulation model using a methodology based on a combination of parallel linear reservoirs (PLR model) [47,48]. In hydrological science, reservoir models have been widely used to represent different characteristics of river basins.…”

Section: Introductionmentioning

confidence: 99%

“…This article investigates the cause of an actual flood event that occurred in the Roncal valley in January 2009, where everything seems to indicate that fusion processes in the basin's snow reservoirs contributed decisively to the activation of the flood. The work is carried out following the methodology developed in Mateo-Lázaro et al [47]. The computer program SHEE (Simulation of Hydrological Extreme Events, as found in http://www.unizar.es/hidrologia) is used to do so, allowing representation of the basin through a distribution of reservoirs in parallel (PLR model) and taking into account the contributions due to the snow melt.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of the Role of Snowmelt in a Flood Event in a Gauged Catchment

Navarro

et al. 2019

An actual event that happened in the Roncal valley (Spain) is investigated and the results are compared between models with and without snowmelt. A distributed rainfall model is generated with the specific data recorded by the rain gauges of the catchment during the episode. To describe the process of water routing in the hydrological cycle of the basin, a model is used based on combinations of parallel linear reservoirs (PLR model), distribution by the basin, and tip-out into its drainage network configured using a digital terrain model (DTM). This PLR model allows simulation of the different actual reservoirs of the basin, including the snow and the contribution due to its melting which, in the model, depends on the temperature. The PLR model also allows for a water budget of the episode where, in addition to the effective rainfall contribution, the water that comes from the thaw is taken into account. The PLR model also allows determination of the amount of water that exists in the basin before and after the episode, data of great interest. When comparing the simulations with and without taking into account the thawing process, it is evident that the intervention of the snow reservoir has been decisive in causing a flood to occur.

“…Regarding the SHEE program, it derived from several publications, including those related to hydrology [48][49][50][51][52][53][54][55][56][57][58][59]. This program uses powerful libraries (e.g., OpenGL, GDI, GDAL, Proj4) for the management and display of DEM and datasets.…”

Section: Description Of the Shee Softwarementioning

confidence: 99%

Comparative Hydrodynamic Analysis by Using Two−Dimensional Models and Application to a New Bridge

García‐Gil

et al. 2020

This document develops a methodology that evaluates the impact on the environment of the rivers produced by the creation of civil infrastructures. The methodology is based on the two-dimensional hydrodynamic calculation by using shallow water equations both in the conditions prior to the creation of the infrastructure, and in the new conditions after the infrastructure is created. Subsequently, several characteristics, such as water depth and velocity, among others, are compared between the initial and final conditions, and a two-dimensional zoning of the changes observed is obtained. The methodology herein presented is useful to verify the impact that the implantation of different infrastructures around the river currents could produce. In addition, it is also relevant for carrying out a study taking into account different infrastructure options related to river currents, as well as for selecting the most suitable one. By using the methodology presented, changes on the regime of the currents caused by the infrastructures can be deduced, including a qualitative and quantitative zoning of the changes, with a special emphasis on some characteristics, such as depth and velocity. The methodology is applied in a case study for the creation of a road bridge over the Jalon River in Spain.