Flood extent from radar
Synthetic-aperture radar sees through cloud. Change detection between a dry reference and the event image maps open water at ten metres, within hours of acquisition.
GCRI · Water Nexus
Satellites see the whole basin at once and return every few days: surface water, soil moisture, snow, vegetation stress and, after an event, the extent of the flood. Earth observation fills the gaps that thinning gauge networks leave.
Earth observation and remote sensing gather information about the Earth’s surface and atmosphere from airborne and spaceborne sensors. They provide consistent, repeatable measurements over areas that are hard to monitor on the ground. In water, climate and hazards and binesaziya girîng, earth observation maps exposure, damage and environmental change across borders and sectors. It supports rapid assessment after disasters and long-term monitoring of risk drivers. The canonical description is on STEM Commons.
Synthetic-aperture radar sees through cloud. Change detection between a dry reference and the event image maps open water at ten metres, within hours of acquisition.
Optical time series track reservoir area and seasonal wetlands over decades, giving a storage proxy where operators do not publish levels.
Vegetation indices, land-surface temperature and radiometer soil moisture are combined into drought indicators that agree, or disagree, with rainfall indices.
Flood water, root-zone soil moisture and rain over the Nile Basin, from NASA GIBS. Each layer carries its own date.
Nexşeya înteraktîf JavaScript hewce dike; lîsteya qatan û çavkanî li jêr in.
Qat 3
Water now, for this page
Klavye, dema ku nexşe di fokusê de ye
Ctrl an ⌘ bigire û bizivirîne da ku nêzîk bikî
Ya herî dawî ya heyî
NASA GIBS / EOSDIS · ASTER GDEM (METI, NASA) · Blue Marble (NASA) · © OpenStreetMap contributors (ODbL) · Natural Earth
Wêneyên herî nû yên NASA tê barkirin.
Bikişîne da ku bilivîne. Ctrl an ⌘ û zivirandin, pincandin an bişkojkan ji bo nêzîkkirinê; ji bo nirxên di bin nîşanderê de li ser bisekine; vegerandin vedigere herêmê.
Water now, framed on the Nile Basin.Berhemên peyk û modelê wekî NASA diweşîne, her yek bi dîroka xwe. Nîşander in, ne nirxandinên tu cihî ne.
Qat û dîrok
Datasets and records used by earth observation and remote sensing on this platform, with the role each plays and the label its values carry. Sources are listed in the source register.
| Dane | Rol | Nîşan |
|---|---|---|
| Sentinel-1 radar | Flood extent, soil moisture | ÇAVDÊRÎKIRÎ |
| Sentinel-2 and Landsat optical | Surface water, vegetation stress | ÇAVDÊRÎKIRÎ |
| SMAP and SMOS radiometers | Şiya axê | MODELKIRÎ |
| GRACE-FO gravimetry | Terrestrial water storage anomaly | MODELKIRÎ |
| MODIS and VIIRS | Snow cover, land-surface temperature | ÇAVDÊRÎKIRÎ |
The screen a team would use to follow this method: its measures, states and decisions. Names are examples and values are illustrative.
Water · Earth observation for water · Run R-8937
revisit and swath
stratified sample
| Av | 95 | 91 | 159 |
| Cropland | 79 | 79 | 174 |
| Built-up | 81 | 78 | 122 |
| Forest | 94 | 89 | 190 |
Products are assessed against ground reference data using accuracy matrices and independent samples. Cross-calibration between sensors checks consistency over time.
| Kontrol bikin | How it is done |
|---|---|
| Ground reference | Flood masks are scored against surveyed high-water marks and gauge-derived extents |
| Cross-sensor consistency | Products from different satellites are compared over the same period before a trend is quoted |
| Cloud and revisit gaps | Every product states its coverage; missing scenes are reported as no data, not as no change |
Clouds, revisit gaps and mixed pixels limit what can be observed. Changes in sensors and processing can create artificial trends.
Assembled from the Nexus Standards area profile Standardên xetera avê: the hazards it names, the pergalan and sectors that carry the loss, the controls that dampen it and the data that observe it. Choose the components, pick an initiating hazard and step through the cascade. The Map view places the run on an example geography with open data. Every coupling weight is a stated assumption you can change. A teaching model, not a forecast, an assessment or a certification. To model a place of your own choosing, open the full System Builder.
Metirsî
Pergal û girêdan
Kontrol
NS-0 Destûr û prensîbNS-1 Çavdêrxaneya UNI û kataloga berheman (rêzimana v0.2: beşên qad, sektor, herêm û jîngehê)NS-3 UNIyên tomara xetereyê (rêzimanî, nexşeya veguhastina ji pergala kevin, desthilata veqetandinê)NS-3b Profîla metadata ya daneset û berheman (STAC, DCAT, PROV-O)NS-9 UNI yên çarçoveyî (belavkirin, mînak, mînakên bernameyê)NS-10 Policies and clauses (machine-readable obligations: definition, binding, evaluation and enforcement)NS-11 Piştrastkirin û çavdêrî (delîl, erêkirin, çavdêriya lihevhatina zero-trust)NRS-U28 Universe platform profile: Water NexusNRS-H61 Malbata metirsiyê: Têkçûna zincîrî (NHS-1 sys.cascade)NRS-K42 Profîla pakêta domainê: Hewzên derbasî-sînor (DOMAIN-042)NRS-N1 Xetera avê û berxwedanNRS-N7 Hevgirêdana av-enerjî-xwarin-tenduristî-cûrbecûrbûna jîndaran-binesazîNRS-H62 Malbata metirsiyê: Bûyerên tevhev û pir-metirsî (NHS-1 sys.compound)Çavdêrî
Erdnîgariya mînakê
The sectors earth observation for water touches and how strongly they depend on each other: what a study has to observe and model together.
Îmze
Av û hevkarên wê
Av dide çandiniyê avdan (0.8), dide enerjiyê ava sarkirinê û hîdroelektrîkê (0.6) û dide cûrbecûrbûna jîndaran herikên jîngehî (0.6).
W · E · I · F · H · B
Ezman û Çavdêriya Erdê stewards earth observation and remote sensing for the Consortium and reviews how it is applied across platforms.
Model, texmînên wî, daneyên wî û nediyariya wî, bi şeweyê ku zanyar an endezyar kontrol bike. Avahî rêbazên weşandî dişopînin. Nirxên hatine xêzkirin nimûneyî ne, ne encam in.
The couplings between the systems in earth observation for water: signs of influence, a reinforcing and a balancing loop, and cross-links where stress jumps.
Process explorer · Process
9 steps·4 qonax·1 gate
Pêvajo
Processing levels are mission specific; Sentinel-2 runs from Level-0 raw data to Level-2A, and CEOS Analysis Ready Data sets the minimum for analysis.
Neutral outline of a published external standard or method, from its issuing body. Not a record of operation. Nexus does not perform, certify or approve any step shown. A gate or decision belongs to the party the source names. Level-1B and Level-1C add corrections; Level-2A adds atmospheric correction and scene classification.
rêzeya Pergalên Stratejîk is the Consortium’s quarterly publication. What you know about this subject can become evidence, a case or a correction in the next edition, credited to you and published under CC BY 4.0 where it is your own work.
Tu carî daneyên şexsî, hûrgiliyên binesaza hesas an tiştekî ku mafê we yê parvekirinê tune ne neşînin. Beşdarî berî bikaranînê tê nirxandin; şandina wê nivîskarî an mafên edîtorî nade û sponsorî tu carî encamekê nakire.
Agahî û pirs îro vekirî ne. Pirsek referansekê distîne û gava piştî wê dide nasîn; serlêdan, drav, veqetandina hesabkirinê û tomarkirin tenê dema ku tîm, mercên wê û kapasîteya vekolînê hebin vedibin.
Nexşe, dane û jimarên vê malperê ji bo çarçoveyê û agahiyên giştî têne nîşandan. Ew ne şîret, ne pêşbînî û ne hişyarî ne; sînorên agahiyê di Daxuyaniyên Berpirsiyariyê û Daxuyaniyên Daneyê de hatine diyarkirin.
This site uses only strictly necessary cookies to work and to remember your privacy choices. Nothing loads from other companies, and we never sell or share your personal information.
This site uses only strictly necessary cookies to work and to remember your privacy choices. Nothing loads from other companies, and we never sell or share your personal information. We run no advertising. You can review your choices at any time through Privacy choices at the foot of every page.