Environmental flow assessment
Flow records and hydraulic models are linked to the habitat needs of fish, vegetation and wetlands to define the flow regime that sustains them.
GCRI · Biodiversity Nexus
Hydrology connects biodiversity to water: flow regimes shape freshwater habitats, wetlands store and release water, and catchment condition affects the quantity and quality of water reaching people. It quantifies the water services ecosystems provide and the flows ecosystems themselves need.
Hydrology studies the movement, distribution and quality of water across the land surface, subsurface and atmosphere. It underpins the assessment of floods, droughts and water supply, which affect food, energy, health and infrastructure together. In biodiversity and nature, climate and hazards and oceans and coasts, hydrological estimates set design standards for dams, levees and drainage and inform water allocation between competing users. They link climate hazards to downstream effects on power generation, crops and public health. The canonical description is on o STEM Commons.
Flow records and hydraulic models are linked to the habitat needs of fish, vegetation and wetlands to define the flow regime that sustains them.
Rainfall-runoff and routing models are run with and without floodplain storage or forest cover to estimate how ecosystems change flood peaks downstream.
Sediment and nutrient models trace how land cover and erosion upstream affect water quality at intakes, reservoirs and coastal habitats.
Flood water, rain and root-zone soil moisture over the Amazon Basin, from NASA GIBS. Each layer carries its own date.
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Mais recente disponível
NASA GIBS / EOSDIS · ASTER GDEM (METI, NASA) · Blue Marble (NASA) · © colaboradores do OpenStreetMap (ODbL) · Natural Earth
Carregando as imagens mais recentes da NASA.
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Water now, framed on the Amazon Basin.Produtos de satélite e de modelos como a NASA os publica, cada um com sua própria data. São indicadores, não avaliações de nenhum lugar.
Camadas e datas
Datasets and records used by hydrology and water science on this platform, with the role each plays and the label its values carry. Sources are listed in registro de fontes.
| Dados | Função | Rótulo |
|---|---|---|
| Stream gauge records | Flow regime and calibration | OBSERVADO |
| JRC Global Surface Water | Wetland and floodplain inundation | OBSERVADO |
| HydroSHEDS river networks | Catchment delineation and connectivity | MODELADO |
| Water quality monitoring | Nutrient and sediment loads | OBSERVADO |
A tela que uma equipe usaria para acompanhar este método: suas medidas, estados e decisões. Os nomes são exemplos e os valores são ilustrativos.
Biodiversity · Hydrology for ecosystems · Run R-6654
held-out period
| T+2 | 0.21 | 0.14 | 0.22 | Skilful |
| T+4 | 0.21 | 0.19 | 0.38 | Skilful |
| T+6 | 0.36 | 0.25 | 0.19 | Skilful |
| T+8 | 0.20 | 0.20 | 0.18 | Skilful |
Models are calibrated on one period of observed flows and tested on an independent period or neighbouring catchment. Skill scores and comparison with surveyed flood extents are used to judge performance.
| Verificar | Como é feito |
|---|---|
| Split-sample calibration | Models are fitted on one period and tested on another, with test-period skill reported |
| Ecological response validation | Flow-ecology relationships are checked against field surveys of the species or habitats they claim to support |
| Paired scenario runs | With-and-without ecosystem runs use the same forcing so that differences can be attributed |
Assumptions of stationarity weaken as climate and land use change. Ungauged basins, karst aquifers and rapid urbanisation are poorly represented by parameters fitted elsewhere.
Rain becomes runoff by the curve number method, drains each sub-catchment through a linear reservoir and travels down the main stem by Muskingum routing; play it to watch the flood wave move and flatten. Teaching model with stated illustrative values, not a prediction. The map on this page shows The Amazon Basin; the model itself is not tied to a place.
Controles
Leituras
| Hour | Outlet (m³/s) | Unrouted (m³/s) | Upper reach (m³/s) |
|---|---|---|---|
| 2.4 | 0.0 | 678.9 | 0.0 |
| 12.0 | 308.3 | 1,151.4 | 181.8 |
| 21.6 | 452.4 | 35.1 | 73.7 |
| 31.2 | 363.3 | 1.1 | 11.1 |
| 40.8 | 198.8 | 0.0 | 1.5 |
| 50.4 | 79.3 | 0.0 | 0.2 |
| 60.0 | 25.4 | 0.0 | 0.0 |
| 69.6 | 6.9 | 0.0 | 0.0 |
| 79.2 | 1.7 | 0.0 | 0.0 |
| 88.8 | 0.4 | 0.0 | 0.0 |
| 98.4 | 0.1 | 0.0 | 0.0 |
| 108.0 | 0.0 | 0.0 | 0.0 |
| 117.6 | 0.0 | 0.0 | 0.0 |
| 127.2 | 0.0 | 0.0 | 0.0 |
| 136.8 | 0.0 | 0.0 | 0.0 |
The model runs on the teaching values set by the controls. To calibrate it for a place, read it against these admitted layers and series, which this page’s map can draw:
Nos seis pilares, sob a liderança do Nexus Consortium
Assembled from the Nexus Standards area profile Normas sobre riscos de biodiversidade e natureza: the hazards it names, the sistemas 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 Construtor de sistemas.
Ameaças
Sistemas e acoplamentos
Controles
NS-0 Constituição e princípiosNS-1 A UNI e o catálogo de artefatos (gramática v0.2: segmentos de domínio, setor, região e ambiente)NS-3 UNIs de registros de risco (gramática, correspondência legada, autoridade de atribuição)NS-3b Perfil de metadados de conjuntos de dados e produtos (STAC, DCAT, PROV-O)NS-5 Padrão de figuras, mapas e visualizações (com o kit de UI/UX)NS-9 UNIs contextuais (implantações, instâncias, instâncias de programa)NS-11 Verificação e monitoramento (evidências, atestações, observação da conformidade de confiança zero)NRS-N5 Risco e resiliência da biodiversidade e da naturezaNRS-H65 Família de ameaças: transgressão dos limites planetários (NHS-1 planet.boundary)NRS-H27 Família de ameaças: Biodiversidade e pressão sobre as espécies (NHS-1 eco.species)NRS-H26 Família de perigos: degradação de terras e zonas húmidas (NHS-1 eco.land)NRS-H28 Família de ameaças: mudanças do estado climático (NHS-1 eco.climate-state)NRS-H64 Família de perigos: mudanças de regime dos ecossistemas (NHS-1 eco.regime-shift)Observação
Geografia de exemplo
Water Nexus stewards hydrology and water science for the Consortium and reviews how it is applied across platforms.
The sectors hydrology for ecosystems touches and how strongly they depend on each other: what a study has to observe and model together.
Assinatura
Water and Biodiversity
Water gives biodiversity environmental flows (0.6): the strongest relations between the sectors this subject joins.
W · E · I · F · H · B
O modelo, os seus pressupostos, os seus dados e a sua incerteza, na forma que um cientista ou engenheiro verificaria. As estruturas seguem métodos publicados. Os valores representados são ilustrativos, não conclusões.
How a satellite or sensor record becomes evidence on hydrology for ecosystems, and where each step adds uncertainty.
Relatórios 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.
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