Modeling and Risk Analysis of Dam-Break Flooding in a Semi-Arid Montane Watershed: A Case Study of the Yabous Dam, Northeastern Algeria

Water, Journal Year: 2022, Volume and Issue: 14(5), P. 767 - 767

Published: Feb. 28, 2022

The risk related to embankment dam breaches needs be evaluated in order prepare emergency action plans. physical and hydrodynamic parameters of the flood wave generated from failure event correspond various breach parameters, such as width, slope, formation time. This study aimed simulate scenario Yabous (northeast Algeria) analyze its influence on areas (urban natural environments) downstream dam. simulation was completed using sensitivity analysis method assess impact flooding break scenario. propagation associated with simulated one-dimensional HEC-RAS hydraulic model. applied a three (slope, time) five sites selected showed that maximum flow recorded at level 8768 m3/s, which gradually attenuated along river course reach 1972.7 m3/s about 8.5 km established map illustrated zones threatened by triggered due extreme rainfall events. flow, height, width revealed positive similar changes for increases adjustments (±25% ±50%) slope sites. However, time significant trends changed opposite direction compared width. Meanwhile, hydrograph did not significantly In present study, 1-D modeling demonstrated effectiveness simulating waves highlighted hydrographical pattern parameters.

Language: Английский

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Identification and Construction of Ecological Nodes in the Fuzhou Ecological Corridors

Forests, Journal Year: 2022, Volume and Issue: 13(11), P. 1837 - 1837

Published: Nov. 4, 2022

Ecological corridor construction is an important support of the current pursuit high-quality urbanization. Fuzhou a mountain–water city characterized by unique spatial structure. However, rapid urbanization has exacerbated rate ecosystem fragmentation, negatively impacting livable living environment. The ecological corridors great significance for efforts to restore broken landscape and form urban as organic whole in Fuzhou. In present study, was considered study area, water, green, ventilation corridors, well surface temperature data, were analyzed using kernel density analysis method generate surface-temperature-based nodes. impacts various temperatures on assessed theory, resistance surfaces influencing factors obtained. We constructed mitigation heat island MCR model with four levels then evaluated network connectivity corridors. results revealed following findings: (1) area comprises 32 nodes, including nine Minhou County Changle District, Mawei Cangshan Districts, two Gulou, Taijiang, Jin’an Districts. (2) contains 63 total length approximately 494.65 km. These include 31 first-level (201.16 km), 11 second-level (98.56 14 third-level (129.12 7 fourth-level (65.81 km) (3) degree closure (α), point lines (β), (γ), (Cr) indexes structure 0.27, 2.03, 0.72, 0.87, respectively. They indicate that overall effectiveness high can provide theoretical basis future.

Language: Английский

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Construction of an Ecological Security Pattern and the Evaluation of Corridor Priority Based on ESV and the “Importance–Connectivity” Index: A Case Study of Sichuan Province, China

Sustainability, Journal Year: 2022, Volume and Issue: 14(7), P. 3985 - 3985

Published: March 28, 2022

Constructing an ecological security pattern (ESP) is important means to describe, manage, and control security. However, there are few related studies on functional analyses evaluations of landscape elements, the distribution identified elements cannot fully reflect reality. To accurately depict strengthen role planning for policy formulation, we used spatial patterns ecosystem services adjust service value identify sources. The gravity model Centrality Mapper tool build “importance–connectivity” index that evaluates importance corridors in linking sources contribution maintaining overall connectivity networks. results show (1) heterogeneity exists seven kinds Sichuan Province, China, high-level areas concentrated central region. Moreover, (2) a total 179 445 with woodland grassland as main land use types identified, (3) 153, 49, 78, 165 divided into high importance–high connectivity, low importance–low corridors, respectively. study provides new framework construction ESP priority evaluation corridors. achieve balance between economic development environmental protection, should be given protection high-priority when

Language: Английский

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Deep learning to assess the effects of land use/land cover and climate change on landslide susceptibility in the Tra Khuc river basin of Vietnam

Geocarto International, Journal Year: 2023, Volume and Issue: 38(1)

Published: Jan. 21, 2023

Understanding the negative effects of climate change and changes to land use/land cover on natural hazards is an important feature sustainable development worldwide, as these phenomena are inextricably linked with such landslides. The contribution this study attempt develop a state-of-the-art method assess in landslide susceptibility Tra Khuc river basin Vietnam. based machine learning remote sensing algorithms, namely radial basis function neural networks–search rescue optimization (RBFNN–SARO), network–queuing search algorithm (RBFNN–QSA), network–life choice-based optimizer (RBFNN–LCBO), network–dragonfly (RBFNN–DO). All proposed models performed well, AUC value >0.9. RBFNN–QSA model best, 0.98, followed by RBFNN–SARO (AUC = 0.97), RBFNN–LCBO 0.95), RBFNN–DO 0.93), support vector (SVM; 0.92). results show that both greatly future: Precipitation increases 18% 2030 25.1% 2050; total production forest, protected forest built-up area considerably between 2010 2050. These influence susceptibility: high very decrease approximately 100 300 km2 respectively from findings can decision-makers formulating appropriate strategies reduce damage landslides, limiting construction areas where future landslides predicted. Although applies particular region Vietnam, be applied other mountainous regions around world.

Language: Английский

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Assessing the Negative Effects of Suburbanization: The Urban Sprawl Restrictiveness Index in Romania’s Metropolitan Areas

Land, Journal Year: 2023, Volume and Issue: 12(5), P. 966 - 966

Published: April 26, 2023

Urban sprawl is widely considered to be a major issue for the functioning of urban areas, threatening long-term sustainability and affecting quality living. The aim this research develop methodology assessing negative effects uncontrolled suburbanization in metropolitan areas through multicriterial approach. Based on existing body knowledge, we have defined set indicators impact suburbanization, covering themes such as land use, water, biodiversity economy or social issues. A questionnaire was applied experts field order find out final their perceived importance. product our an restrictiveness index at local level, tested five most dynamic Romania. results highlight concentration accessible from city core, where additional in-depth analyses were performed validation. This study thus proposes novel method impacts sprawl. could used other comparative studies national international level while also aiding policymakers better managing areas.

Language: Английский

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From the Beehives: Identification and Comparison of Physicochemical Properties of Algerian Honey

Resources, Journal Year: 2021, Volume and Issue: 10(10), P. 94 - 94

Published: Sept. 23, 2021

In this study, the authors aimed at characterizing 11 Algerian kinds of honey taken from various geographical locations (beehives located Djelfa (Medjbara and Dzaira), Laghouat, Aflou, Medea, Tiaret, Sidi bel-Abbes, Ain-Safra, Mostaganem, El Bayadh, Ghardïa). The investigated physicochemical parameters these samples, including density, water content, electrical conductivity, ash pH, hydroxymethylfurfural (HMF) free acidity, color. obtained were found to be within acceptable ranges according international standards (Codex Alimentarius) for 9 out analyzed samples: density 1.38–1.50 g/cm3 (the same as kg/L, commonly used honey), content 14.03–18.80%, conductivity 0.38 × 10−1 − 6.41 mS/cm, 0.06–0.48%, pH 3.50–4.50, acidity 11–47 meq/kg, color 1.1–9.2 Pfund index. Analysis HMF showed that only two samples have high values (117.7 90.0 meq/kg). Most are suitable quality standards.

Language: Английский

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Comparison of bird diversity between temperate floodplain forests and urban parks

Urban forestry & urban greening, Journal Year: 2021, Volume and Issue: 67, P. 127427 - 127427

Published: Nov. 25, 2021

Language: Английский

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Evaluating the effects of climate and land use change on the future flood susceptibility in the central region of Vietnam by integrating land change modeler, machine learning methods

Geocarto International, Journal Year: 2022, Volume and Issue: 37(26), P. 12810 - 12845

Published: April 27, 2022

The crucial importance of land cover and use changes climate for worldwide sustainability results from their negative effects on flood risk. In a watershed, particularly important research question concerning the relationship between change risk is subject controversy in literature. This study aims to assess susceptibility watershed Nhat Le–Kien Giang, Vietnam using machine learning Land Change Modeler. show that Social Ski Driver Optimization (SSD), Fruit Fly (FFO), Sailfish (SFO), Particle Swarm (PSO) successfully improve Support Vector Machine (SVM) model's performance, with value Area Under Receiver Operating Characteristic curve (AUC) > 0.96. Among them, SVM-FFO model was better AUC 0.984, followed by SVM-SFO (AUC = 0.983), SVM-SSD 0.98), SVM-PSO 0.97), respectively. addition, areas high very area increased about 30 km2 2020 2050 model. Our underline consequences unplanned development. Thus, applying theoretical framework this study, decision makers can take sound more planning measures, such as avoiding construction often affected floods, etc. Although studied Central Coast province, be applied other rapidly developing flood-prone provinces Vietnam.

Language: Английский

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Characterization and Planning of Household Waste Management: A Case Study from the MENA Region

Sustainability, Journal Year: 2022, Volume and Issue: 14(9), P. 5461 - 5461

Published: May 1, 2022

Solid waste management is one of the most important environmental issues worldwide, particularly in MENA countries. The present study was carried out city Algiers, capital Algeria. This urban area marked by an increase flow combined with a demographic surge. In order to investigate production and its drivers, we used both multiple regression correlation analyses test this dependence. Geospatial analysis performed using principal component integrated GIS look at spatial distribution potential drivers production. results indicate that household influenced related size settlement characteristics companies (p ≤ 0.05). findings also show none sociodemographic variables were found significantly influence However, geographic Algeria all territorial levels. Algiers still landfill-based region, where mixed collection prevails districts. reinforces importance expanding source-separated schemes diversion from landfills and, more importantly, shows how modern tools such as GIS, analysis, planning are useful for monitoring waste, line circular economy principles.

Language: Английский

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Evaluation and Structuring of Agrodiversity in Oases Agroecosystems of Southern Morocco

Agriculture, Journal Year: 2023, Volume and Issue: 13(7), P. 1413 - 1413

Published: July 17, 2023

Oases play a crucial role in human societies and the conservation of biodiversity, especially harsh environments like arid zones. They serve as sanctuaries for agrodiversity, preserving diverse agricultural resources under challenging climatic conditions. However, these agroecosystems are becoming increasingly vulnerable to climate fluctuations, droughts, other environmental changes. Understanding unique is essential developing effective strategies protect them. Agrodiversity serves key indicator overall health traditional agroecosystems. To assess richness diversity field surveys were conducted six representative oases southern Morocco. Within each oasis, we interviewed 20 farmers five ksour. Our findings confirm widespread practice polyculture reveal significant among oases. A total 55 crops identified, consisting 183 varieties. Specifically, oasis Tata employed 42 crops, Alnif had 41 Guelmim 38 Aoufouss 32 Rich 29 Zagora 28 crops. The profiles varieties clearly distinguish between ksour oases, highlighting identities oasis. modernization farming practices influenced by factors such farm size, plot fragmentation, dispersal, irrigation methods. its consequences concerning. There risk losing agrodiversity compromising food security local populations. shift from household consumption cash has negative implications availability nutritious food. Moreover, often leads increased water consumption, further straining already limited

Language: Английский

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