Determination of curve number in Betancí subwatershed (Córdoba, Colombia) through remote sensing and GIS

Carvajal, Ángel Diaz; Fernández, Teobaldis Mercado

doi:10.14482/inde.35.2.10171

Cited by 5 publications

(3 citation statements)

References 6 publications

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“…To create the input layers, the parameters for the 1D model, including connections, conduits, drains, and subbasins, were exported to PCSWMM from a GIS. The Curve Number (CN) method was used to estimate runoff (Diaz Carvajal & Mercado Fernández, 2017).…”

Section: Methodsmentioning

confidence: 99%

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Development of a hazard risk map for assessing pedestrian risk in urban flash floods: A case study in Cúcuta, Colombia

Corzo Perez,

Sanchez Tapiero,

Contreras Martínez

et al. 2024

River

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The rapid growth of impervious areas in urban basins worldwide has increased the number of impermeable surfaces in cities, leading to severe flooding and significant economic losses for civilians. This trend highlights the urgent need for methodologies that assess flood hazards and specifically address the direct impact on pedestrians, which is often overlooked in traditional flood hazard analyses. This study aims to evaluate a methodology for assessing the risk to pedestrians from hydrodynamic forces during urban floods, with a specific focus on Cúcuta, Colombia. The methodology couples research outcomes from other studies on the impact of floodwaters on individuals of different ages and sizes with 1D/2D hydrological modeling. Advanced computational algorithms for image recognition were used to measure water levels at 5‐s intervals on November 6, 2020, using drones for digital elevation model data collection. In Cúcuta, where flood risk is high and drainage infrastructure is limited, the PCSWMM (Computer‐based Urban Stormwater Management Model) was calibrated and validated to simulate extreme flood events. The model incorporated urban infrastructure details and geomorphological parameters of Cúcuta's urban basin. Four return periods (5, 10, 50, 100), with extreme rainfall of 3 h, were used to estimate the variability of the risk map. The output of the model was analyzed, and an integrated and time‐varying comparison of the results was done. Results show that the regions of high‐water depth and high velocity could vary significantly along the duration of the different extreme events. Also, from 5 to 100 years return period, the percentage of area at risk increased from 9.6% to 16.6%. The pedestrian sensitivity appears much higher than the increase in velocities or water depth individually. This study identified medium to high‐risk locations, which are dynamic in time. We can conclude dynamics are spatiotemporal, and the added information layer of pedestrians brings vulnerability information that is also dynamic. Areas of immediate concern in Cúcuta can enhance pedestrian safety during flash flood events. The spatiotemporal variation of patterns requires further studies to map trajectories and sequences that machine learning models could capture.

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Section: Methodsmentioning

confidence: 99%

“…from a GIS. The Curve Number (CN) method was used to estimate runoff (Diaz Carvajal & Mercado Fernández, 2017).…”

Section: Phase 3: Model Setupmentioning

confidence: 99%

Development of a hazard risk map for assessing pedestrian risk in urban flash floods: A case study in Cúcuta, Colombia

Corzo Perez,

Sanchez Tapiero,

Contreras Martínez

et al. 2024

River

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show abstract

“…The method known as curve number (Equation ( 3)) obtained the runoff coefficient (C), which requires data on the runoff threshold (Po), which depends on the potential retention (S) (Equations ( 4) and ( 5)). The curve numbers (CN) obtained come from the combinations of the water group and the land use to which the area belongs; these values are extracted from tables [53]:…”

Section: Hydrological Studymentioning

confidence: 99%

Hill Dam Design to Improve Water Use in Rural Areas—Case Study: Sacachún, Santa Elena

et al. 2022

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The Sacachún commune in Ecuador currently faces a lack of water for its agricultural development; this reduces its possibilities of socio-economic development and causes migration to urban areas. This research proposes a presa colinar (hill dam) design that uses ancestral knowledge and classic engineering techniques to promote water use during the dry season in semi-arid regions. The methodology consisted of: (i) a systematic compilation of the ancestral structures used for water planting and harvesting in Ibero-American; (ii) selecting an appropriate place to build the hill dam; (iii) the dam’s body design; (iv) and creating a proposal for agricultural water use. The results helped define a good location for the hill dam implementation. In addition, a 10 m high and 40 m wide earthen dam was designed, with a storage capacity of 114,341 m3, extending agriculture to 7.5 ha through a polyculture system of six different plants. The embankment has a cofferdam located downstream, which provides stability in static and pseudo-static conditions. In addition, the dam slopes have a 2:1 ratio, and a spillway channel and filter drain were dimensioned to protect the dam.

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Numerical modeling of nutrient transport to assess the agricultural impact on the trophic state of reservoirs

Torres-Bejarano

García-Gallego²,

Salcedo-Salgado³

2023

International Soil and Water Conservation Research

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Determination of curve number in Betancí subwatershed (Córdoba, Colombia) through remote sensing and GIS

Cited by 5 publications

References 6 publications

Development of a hazard risk map for assessing pedestrian risk in urban flash floods: A case study in Cúcuta, Colombia

Development of a hazard risk map for assessing pedestrian risk in urban flash floods: A case study in Cúcuta, Colombia

Hill Dam Design to Improve Water Use in Rural Areas—Case Study: Sacachún, Santa Elena

Numerical modeling of nutrient transport to assess the agricultural impact on the trophic state of reservoirs

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