Hydrological

Definition

A hazard caused by the occurrence, movement, and distribution of surface and subsurface freshwater and saltwater.

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Événement

EO4SD webinar logo. Image: EO4SD

The European Space Agency’s Earth Observation for Sustainable Development (EO4SD) Climate Resilience Cluster is hosting a free webinar to provide insight about the potential of Earth Observation (EO) to support climate-resilient decision making at the regional and national scale.

Earth Observation (EO) data and services are vital tools for the water sector, supporting flood events, and conducting wetland inventory status in rural and urban areas. EO provides valuable information (Flood extent, historical flood events etc.) with the aim to assist authorities to prepare the most effective actions to manage flood risk and develop plans to tackle disasters. The fourth webinar of series will present in detail how Earth Observation data with different spatial and temporal resolution can contribute to flood risk, water and wetness management.

2nd Edition of World Congress on Geology & Earth Science logo. Image: Innovinc International

GeoEarth-2020 welcomes colleagues from all branches of Geosciences and from many countries in the world to participate to the second edition of thw 'World Congress on Geology and Earth Science'. The Conference will enable the sharing of best practices in Geoscience as well as exploring the role of remote sensing in monitoring Earth processes and dynamics.

The topics of the Conference include:

  • Environmental Geology, 
  • GIS, Remote Sensing and Geospatial Sciences, 
  • Marine Geosciences and Oceanography,
  • Groundwater and Hydrology: Surface Hydrology/Surface Water,
  • Rock Deformation and Structural Geology,
  • Volcanology and Plate Tectonics,
  • Earth, Ecology and Ecosystems,
  • Soil Science and Conservation of Soil Biodiversity.
EO4GEO logo. Image: EO4GEO

EO4GEO aims to bridge the skills gap between the supply and demand of education and training in the space/geospatial sectors, fostering the uptake and integration of space/geospatial data and services in a broad range of application domains. 

The event includes sessions on:

  • Introduction to Copernicus and Services (with COVID-19 examples)
  • The role of Earth Observation in emergency situations
  • NO2 Air pollution monitoring 
  • Three case studies on how satellite data combined with other data is valued for agriculture, nature conservation and monitoring of forest for detection of fire and diseases
  • The role of EO in emergency situations
  • Maritime Spatial Planning. 
Grace webinar. Image: NASA
This lightning-style training is designed to answer the demand and interest from the applications community in technologies that can be used to support water resources management. The webinar will provide an overview of the GRACE missions, groundwater data availability, and their applications in the monitoring and management of water resources. This lightning webinar will also serve as the foundation for the upcoming advanced webinar: Using Earth Observations to Monitor Water Budgets for River Basin Management II.
 
By the end of this training, attendees will be able to:
  • Access GRACE data and analyze regional groundwater changes
EGU 2020 logo. Image: EGU

EGU2020: Sharing Geoscience Online (#shareEGU20) brings part of the activities of the EGU General Assembly 2020 online. Participants will join meetings, share their research and discuss with colleagues.

The event will include topics such as:

  • Geochemistry, Mineralogy, Petrology Volcanology 
  • Hydrological Sciences
  • Natural Hazards 
  • Nonlinear Processes in Geosciences 
  • Ocean Sciences   
  • Planetary & Solar System Sciences 
  • Seismology  
  • Stratigraphy, Sedimentology & Palaeontology  
  • Soil System Sciences  
  • Solar-Terrestrial Sciences 
  • ... read more
SMOS 2020 logo. Image: ESA

This symposium will explore address the use of a decade of SMOS (Soil Moisture and Ocean Salinity) data for climate research. Many processes, especially related to climate, occur on temporal and spatial scales that are well beyond the lifetime of an individual mission. Ten years of SMOS data are hence a valuable long-term consistent satellite data records to study these processes and to understand changes in the Earth System, for example in the global water or carbon cycle. In addition, longer data records increase the level of confidence in estimating extreme events, such as droughts or tropical cyclones.

The symposium is open to scientists and engineers interested in exploring the capabilities of 10 years of SMOS data, also in synergy with other space or ground based data sources, for climate applications.

The topics that will be discussed are:

  • Relevance of 10 years of SMOS data for climate research and international climate activities (Sustainable... read more
CRYOSAT logo. Image: ESA

As well as providing critical information about ice, CryoSat has also demonstrated that it can offer a valuable source of data for oceanography, hydrology and geodesy.

The conference therefore provides a forum for international scientists and operational users to present and share state-of-the-art CryoSat-based results, its decadal contribution to science and future perspectives in the following areas:

  • Sea ice
  • Greenland and Antarctica icesheets
  • Glaciers and ice caps
  • Oceans and marine gravity
  • Hydrology
  • Icebergs & ice shelves
  • 10 Years of operations, synergies and future missions

Actualités

Water Resource Map. Image: IWMI

The International Water Management Institute (IWMI) and Digital Earth Africa (DEA) have partnered to develop tools and applications that will support water resource management and water security in Africa. The applications will use remote-sensing and machine learning technologies and will produce measurements that can improve the understanding of Africa’s changing landscape and provide African governments, communities, and companies with insights, knowledge, and analysis to make more informed and strategic decisions.  

IWMI and DEA will first develop an application for water accounting that can produce timely and quality information to better understand water use and availability, water risks, water quality, water values and efficiency, water allocations across different sectors, and the downstream implications of new irrigation schemes. IWMI will also develop tools for flood and drought mapping and early warning systems and will work with different... read more

Publishing date: 11/05/2020
Regional Support Offices mentioned:
Wetlands of Uganda from Copernicus Sentinel data. Image: ESA

The European Space Agency’s (ESA) GlobWetland Africa project has produced maps that demonstrate how satellite observations can be used for the effective use and management of wetlands in Africa. The project, created in collaboration with the African Team of the Ramsar Convention on Wetlands, provides national and international stakeholders with the necessary satellite-based methods and tools useful for the conservation and effective management of wetlands. 

The initiative provides a software platform built on the free and open-source QGIS geographic information system (GIS). The platform shows how optical and radar observations combining long-time data sets from different satellites can be used for studying wetland status and trends. For instance, the project shows how it is possible to map wetland habitat using a Random Forest (RF) classification of multi-spectral satellite imagery from Sentinel-2 and Landsat (TM, ETM, OLI). To identify wetland inventory... read more

Publishing date: 20/02/2020

Data Source

Publishing institution: The University of Tokyo
MERIT Hydro is a global hydrography datasets, developed based on the MERIT DEM and multiple inland water maps. It contains flow direction, flow accumulation, hydrologically adjusted elevations, and river channel width., High-resolution raster hydrography maps are a fundamental data source for many geoscience applications. Here we introduce MERIT Hydro, a new global flow direction map at 3 arc-second resolution (~90 m at the equator) derived from the latest elevation data (MERIT DEM) and water body datasets (G1WBM, GSWO, and OpenStreetMap). We developed a new algorithm to extract river networks near-automatically by separating actual inland basins from dummy depressions caused by the errors in input elevation data. After a minimum amount of hand-editing, the constructed hydrography map shows good agreement with existing quality-controlled river network datasets in terms of flow accumulation area and river basin shape. The location of river streamlines was realistically aligned with existing satellite-based global river channel data. Relative error in the drainage area was smaller than 0.05 for 90% of GRDC gauges, confirming the accuracy of the delineated global river networks. Discrepancies in flow...

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