What's happening at IRRI

Joint Seminar: CESD and SSD

Wednesday, January 21, 2015, 10:00am - 11:00am


Enhancement of wetland sciences through open innovation network
using tropical HyperObservation System (THOS)

Prof. Mitsuru Osaki
Research Faculty of Agriculture
Hokkaido University, Japan

Abstract: Eleven of the fifteen big river deltas are located between tropical and subtropical zones, and most of them are seriously influenced by climate change impacts such as sea level rise, flood and drought. As the deltas have fertile soil and a good supply of fresh water, they have historically maintained high human populations. Changes like pollution, land degradation, and LULUCF (land use and land use change and forestry) in the delta ecosystems will have major impacts on human activities in these deltas. The Tropical HyperObservation System (THOS) was introduced to study the key factors of ecosystems in the tropical zone, especially catchment in deltas using an innovative technology, a hypersenser. At first, the THOS was introduced in the Mekong Delta area and Southeast Asian maritime continent adjacent to the Mekong Delta (referred to as Mekong Delta ecosystems). Then, based on the results from this core study, THOS was expanded to the whole tropical zone ecosystems to establish the THOS network. The tropical and subtropical regions are a rich repository of issues of human-ecology-environment hyperlinkage (HEEH) system, and it includes unique zones such as: 1) delta zone (75% of the main delta in the world is in tropical and subtropical regions), 2) high biodiversity zones (terrestrial Borneo, the Amazon basin, and the mountain, coastal and sea areas of Southeast Asia); 3) high carbon reservoir ecosystem (peatland, wetland, mangrove, coral in Southeast Asia, Amazon basin, and Central Africa); and 4) natural disaster zone (increasing sea level and drought or flood due to climate change). An HEEH system is extremely complex. Reliable satelite remotely sensed information related to an HEEH system is hard to obtain in tropical zone, because of heavy clouds. Also, it is very difficult to apply conventional remote sensing in tropical ecosystem analyses, because the number of spectral bands in conventional sensors is small. The microsatellite and the hyperspectral sensor are innovating tropical real-time observation systems. Mega data analyses using information collected through the microsatellite, hyperspectral sensor will contribute to resolving problems in socio-economic system analyses, and to HEEH system management to mitigate impacts from climate change in the deltas of tropical and subtropical regions.


SSD Conference Room, Drilon Hall