Watershed

Arjen Haag is a hydrologist and remote sensing analyst working at the Operational Water Management & Early Warning department of Deltares. We talk to him about the role that earth observation plays in his projects, SERVIR-Mekong, his experiences in the space and water sector and his vision for innovation in the remote sensing community. We ask him about challenges related to flood mapping and forecasting, whether water data should be shared openly and the transfer of knowledge to those needing it the most. He shares his insights on the use of satellite data, algorithms and models, as well as artificial intelligence and machine learning. And finally, why sandcastles were important for all of this.

Padmi is currently reading for her Ph.D. focusing on Nature-based Solutions (NbS) for climate change risk reduction and resilience cities. She believes NbS can reduce hydro-meteorological hazards such as floods, droughts, and landslides in the long run. It is a strategy to minimize the gaps in decarbonizing and reducing greenhouse gases and a path to Net-zero cities. NbS, are actions to protect, sustainably manage, and restore natural and modified ecosystems that address societal challenges effectively and adaptively, benefiting people and nature (IUCN & World Bank, 2022). Ecosystem-based adaptation (EbA), ecosystem-based disaster risk reduction (Eco-DRR), ecosystem-based mitigation (EbM), and green infrastructure are some branches under the umbrella of NbS. NbS include conserving forests, mangroves, and wetland ecosystems, halting deforestation, increasing reforestation, climate-smart agriculture, and opening green spaces. According to her, space technology is integral to planning, monitoring, and analysis. Space technology today is so advanced that it can capture and predict changes in the water cycle, climate change variables and so forth. Remote sensing data and satellite-derived information are essential in obtaining accurate data on a specific site anywhere on the Earth's surface. Most recently, she has been involved in projects utilizing urban NbS such as the conservation of Ramsar-Colombo to mitigate urban floods and adapt to climate change. To conduct wetland inventories, space-based data and GIS techniques can be utilized to detect the presence of wetlands and/or water in wetlands. Though there can be some challenges encountered such as limited coverage of specific areas within the wetland, clouds often hiding images, and the low resolution of data making it difficult to differentiate floral species. Unmanned Aerial Vehicles (drones) can provide enhanced accuracy and consistency in measuring wetlands, as well as the presence of water in wetlands, using space technologies. Data and technologies from space contribute to watershed management, sediment measurements and many other environmental aspects.

Padmi is currently reading for her Ph.D. focusing on Nature-based Solutions (NbS) for climate change risk reduction and resilience cities. She believes NbS can reduce hydro-meteorological hazards such as floods, droughts, and landslides in the long run. It is a strategy to minimize the gaps in decarbonizing and reducing greenhouse gases and a path to Net-zero cities. NbS, are actions to protect, sustainably manage, and restore natural and modified ecosystems that address societal challenges effectively and adaptively, benefiting people and nature (IUCN & World Bank, 2022). Ecosystem-based adaptation (EbA), ecosystem-based disaster risk reduction (Eco-DRR), ecosystem-based mitigation (EbM), and green infrastructure are some branches under the umbrella of NbS. NbS include conserving forests, mangroves, and wetland ecosystems, halting deforestation, increasing reforestation, climate-smart agriculture, and opening green spaces. According to her, space technology is integral to planning, monitoring, and analysis. Space technology today is so advanced that it can capture and predict changes in the water cycle, climate change variables and so forth. Remote sensing data and satellite-derived information are essential in obtaining accurate data on a specific site anywhere on the Earth's surface. Most recently, she has been involved in projects utilizing urban NbS such as the conservation of Ramsar-Colombo to mitigate urban floods and adapt to climate change. To conduct wetland inventories, space-based data and GIS techniques can be utilized to detect the presence of wetlands and/or water in wetlands. Though there can be some challenges encountered such as limited coverage of specific areas within the wetland, clouds often hiding images, and the low resolution of data making it difficult to differentiate floral species. Unmanned Aerial Vehicles (drones) can provide enhanced accuracy and consistency in measuring wetlands, as well as the presence of water in wetlands, using space technologies. Data and technologies from space contribute to watershed management, sediment measurements and many other environmental aspects.

Arjen Haag is a hydrologist and remote sensing analyst working at the Operational Water Management & Early Warning department of Deltares. We talk to him about the role that earth observation plays in his projects, SERVIR-Mekong, his experiences in the space and water sector and his vision for innovation in the remote sensing community. We ask him about challenges related to flood mapping and forecasting, whether water data should be shared openly and the transfer of knowledge to those needing it the most. He shares his insights on the use of satellite data, algorithms and models, as well as artificial intelligence and machine learning. And finally, why sandcastles were important for all of this.