Water resources in urban systems: El Zapotillo dam as occasional negentropy in the metropolis of Guadalajara, Mexico

Pérez, Mario Guadalupe González; Aguirre, Francisco; Lizcano, José Andelfo

doi:10.15446/dyna.v86n209.75824

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…The increase in environmental temperatures and the depletion of the rainfall regime in the SGRB are becoming more obvious each year. Deforestation, excessive pollution, overexploitation of water resources, and overpopulation have been implicated as the main factors [3,14,23].…”

Section: Problem Descriptionmentioning

confidence: 99%

Development of a Watershed Sustainability Index for the Santiago River Basin, Mexico

Núñez-Razo,

de Anda,

Barrios-Piña

et al. 2023

Sustainability

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Sustainability indices are a way of quantifying the progress that a certain region has achieved in terms of sustainability that can be transmitted to society and decision makers. The watershed approach has become relevant for managing water resources and ensuring their sustainability. This study combined the above two approaches by applying an adapted watershed sustainability index (WSI) to evaluate the sustainable development of the Santiago–Guadalajara River basin (SGRB), which passes through Guadalajara, the second-most populous city in Mexico. The river is the most polluted waterway in the country. The WSI of each sub-basin places the SGRB at a sustainability level between low in the upper and lower basin region and intermediate in the central basin region. Regions with a low sustainability level are characterized by environmental degradation due to changes in land use, while in the region with intermediate sustainability, the factor that most affect the evaluation is water availability. An overall sustainability score of WSI = 0.36 was obtained for the study area, which is lower than that of any other basins evaluated in the same manner around the world. These results send a clear message to decision makers of the three government levels, in charge of the environmental sustainability of the basin, of the need to take action to facilitate its recovery.

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Section: Problem Descriptionmentioning

confidence: 99%

Development of a Watershed Sustainability Index for the Santiago River Basin, Mexico

Núñez-Razo,

de Anda,

Barrios-Piña

et al. 2023

Sustainability

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Foundations of the Relative Constancy of Mean Velocity for Natural Streams: A General Principle of Steady State Anticipated by L. Prandtl and L. Leopold

Aragón¹,

Peña-Guzmán²,

Peña-Olarte³

2020

Int J Math, Eng, Manag Sci

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Mean velocity is a key parameter for understanding, modeling and predicting the complex phenomena of advection and dispersion in natural watercourses, which are threatened by human intervention and river disasters. For this reason, the principles of relative constancy for the value of this parameter, established early by L. Prandtl and L. Leopold in the 20th century, are powerful theoretical tools for those who develop engineering tasks in this field. This article presents updated analyses of these principles, explaining how this constancy depends essentially on the existence of a steady state in the flow, which allows equiprobability in the system, and therefore, a minimum production of entropy. At the same time an equation is developed, as a function of macroscopic parameters, facilitating its interpretation and practical application. This hypothesis is contrasted by reviewing the relative values for those parameters and their effect on the formula, and defining the practical conditions of applicability of the formula. This method of validating the hypothesis is important in hydrometric practice, as flow velocity measurements are the starting point for their description, especially for large rivers where comprehensive assessments are impossible.

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Water resources in urban systems: El Zapotillo dam as occasional negentropy in the metropolis of Guadalajara, Mexico

Cited by 2 publications

References 3 publications

Development of a Watershed Sustainability Index for the Santiago River Basin, Mexico

Development of a Watershed Sustainability Index for the Santiago River Basin, Mexico

Foundations of the Relative Constancy of Mean Velocity for Natural Streams: A General Principle of Steady State Anticipated by L. Prandtl and L. Leopold

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