Satellite detected water extents between 12 and 16 October 2022 over Nicaragua

✦ DISCOVERED BY ORIONAIUnited Nations Satellite Centre (UNOSAT)WaterNicaragua
Nicaragua

About this dataset

**UNOSAT code TC20221014NIC** This map illustrates cumulative satellite-detected water using VIIRS in Nicaragua between 12 to 16 October 2022 compared with the period from 27 September to 01 October 2022. Within the cloud free analyzed areas of about 240,000 km², a total of about 3,200 km² of lands appear to be affected. Water extent appears to have increased of about 2,300 km² since the period between 27 September to 01 October 2022. Based on Worldpop population data and the maximal flood water extent ~120,000 people are potentially exposed or living close to flooded areas amongst the 6,570,000 people living in cloud free areas. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to the United Nations Satellite Centre (UNOSAT).

Documentation

UNOSAT datasets and maps are produced using a variety of methods. In general, analysts closely review satellite imagery, often comparing two or more images together, and determine notable changes between the images. For damage assessments, refugee or IDP assessments, and similar analyses, these changes are then manually documented in the vector data by the analyst. For flood extractions, landcover mapping and similar analyses, a variety of automated remote sensing techniques are used to extract the relevant information which is then reviewed and revised as necessary by the analyst. In all cases, resulting data is then loaded into a standardized UNOSAT geodatabase and exported asshapefiles for dissemination. This is a preliminary assessment and has not yet been validated in the field. It is important to consider the characteristics of the source imagery used in the analyses when interpreting results. For damage assessments it should be noted that only significant damage to the structural integrity of the buildings analyzed can be seen in imagery, while minor damage such as cracks or holes may not be visible at all. For flood extractions using radar data it is important to note that urban areas and highly vegetated areas may mask the flood signature and result in underestimation of flood waters. Users with specific questions or concerns should contact unosat@unitar.org to seek clarification.

Related datasets

✦ Suggested by OrionAI
Satellite detected water extents between 12 and 16 October 2022 over Region Autonoma del Atlantico Norte, Nicaragua

**UNOSAT code TC20221014NIC** This map illustrates cumulative satellite-detected water using VIIRS in Region Autonoma del Atlantico Norte, Nicaragua between 12 to 16 October 2022 compared with the period from 27 September to 01 October 2022. Within the cloud free analyzed areas of about 30,000 km², a total of about 1,900 km² of lands appear to be affected. Water extent appears to have increased of about 1,400 km² since the period between 27 September to 01 October 2022. Based on Worldpop population data and the maximal flood water extent ~8,500 people are potentially exposed or living close to flooded areas amongst the 29,000 people living in cloud free areas. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to the United Nations Satellite Centre (UNOSAT).

Water · United Nations Satellite Centre (UNOSAT)
ViewSave
Inundaciones en Nicaragua entre el 13 y 17 de Noviembre 2020

**UNOSAT code: TC20201116NIC** Este mapa ilustra las inundaciones detectadas por el satélite NOAA-VIIRS en Nicaragua entre el 13 y 17 de Noviembre. Dentro del área analizada de aproximadamente 95,000 km2, un total de aproximadamente 2,000 km2 de tierras parecen estar inundadas. Basado en los datos de población de Worldpop y la extensión de las aguas superficiales detectadas, alrededor de 100,000 personas están potencialmente expuestas o viven cerca de áreas inundadas. La población potencialmente expuesta se encuentra principalmente en el departamento de Chinandega con ~25,000 habitantes, en el departamento de Manague con ~16,000 habitantes, y em el departamento de Atlántico Norte con 10,000 habitantes. Se trata de un análisis preliminar que aún no ha sido validado en el terreno. Por favor envíe comentarios a UNITAR-UNOSAT.

Population · United Nations Satellite Centre (UNOSAT)
ViewSave
Satellite detected waters in Puerto Cabezas, Prinzapolka, Laguna de Perlas Municipality, Nicaragua as of 8 November 2020

**UNOSAT code: TC20201103NIC** This map illustrates satellite-detected surface waters in Puerto Cabezas, Prinzapolka and Launa de Perlas Municipality, Nicaragua as observed from Sentinel-1 image acquired on 08 November 2020. Within the analyzed area of about 12,000 km2, a total of about 1,200 km2 of lands appear to be flooded. Based on Worldpop population data and the detected surface waters, about 7,500 people are potentially exposed or living close to flooded areas. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR - UNOSAT. Important note: Flood analysis from radar images may underestimate the presence of standing waters in built-up areasand densely vegetated areas due to backscattering properties of the radar signal.

Water · United Nations Satellite Centre (UNOSAT)
ViewSave
Satellite detected water extent between 25 and 29 May 2022 over Guyana

**UNOSAT code: FL20220526GUY** This map illustrates cumulative satellite-detected water using VIIRS in Guyana between 25 to 29 May 2022 compared with the period from 20 to 24 May 2022. Within the cloud free analyzed areas of about 205,000 km2, a total of about 3,900 km2 of lands appear to be affected with flood waters. Water extent appears to have increased of about 1,200 km2 since the period between 20 to 24 may 2022. Based on Worldpop population data and the maximal flood water coverage, ~22,000 people are potentially exposed or living close to flooded areas. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to the United Nations Satellite Centre (UNOSAT).

Water · United Nations Satellite Centre (UNOSAT)
ViewSave
Satellite detected water extents from 26 August to 2 September 2024 over Pakistan

**UNOSAT code: FL20240804PAK** This map illustrates cumulative satellite-detected water using VIIRS in Pakistan from 26 August 2024 to 02 September 2024 compared with the period from 20 to 26 August 2024. Within the cloud free analysed areas of about 800,000 km², a total of about 37,000 km² of lands appear to be affected with flood waters. Water extent appears to have increased of about 3,000 km² since the period between 20 to 26 August 2024. Based on Worldpop population data and the maximum flood water extent ~12 million people are potentially exposed or living close to flooded areas. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to the United Nations Satellite Centre (UNOSAT).

Water · United Nations Satellite Centre (UNOSAT)
ViewSave
Satellite detected water extents between 14 and 18 October 2022 over Chad

**UNOSAT code FL20221019TCD** This map illustrates cumulative satellite-detected water using VIIRS in Chad between 14 to 18 October 2022. Within the cloud free analysed areas of about 1,200,000 km², a total of about 24,300 km² of land appears to be affected. Based on Worldpop population data and the maximal flood water extent ~1.4 million people are potentially exposed or living close to flooded areas amongst the 16.5 million people living in the analysed zone. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to the United Nations Satellite Centre (UNOSAT).

Water · United Nations Satellite Centre (UNOSAT)
ViewSave

Indexed by OrionGIS from Humanitarian Data Exchange (HDX). Data is loaded from the publisher's own server when you use it. Permanent link