Allocation under variable flow
Long flow records and climate-adjusted projections test whether fixed allocation volumes in a basin agreement can be met in dry years, and how proportional rules would behave.
GRF · Rêveberiya avhewa û xwezayê
Hydrology describes how water moves through catchments, aquifers and rivers. In basin and water governance it provides the flow, storage and variability evidence on which allocation rules, treaty shares and drought procedures depend, and it shows how upstream decisions travel downstream.
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 climate and hazards, biodiversity and nature, water and food and agriculture, 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 the STEM Commons.
Long flow records and climate-adjusted projections test whether fixed allocation volumes in a basin agreement can be met in dry years, and how proportional rules would behave.
Hydrological models estimate how a proposed dam or abstraction changes flow timing and quantity downstream, as evidence for notification and joint assessment.
Gauging networks and data exchange protocols are designed so that riparian parties share the same flow record.
Rain, flood water, root-zone soil moisture and population density over the Andes, from NASA GIBS. Each layer carries its own date.
Nexşeya înteraktîf JavaScript hewce dike; lîsteya qatan û çavkanî li jêr in.
Qat 4
Av niha, ji bo vê rûpelê
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 Andes.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 hydrology and water science on this platform, with the role each plays and the label its values carry. Sources are listed in the source register.
| Dane | Rol | Nîşan |
|---|---|---|
| GRDC river discharge records | Observed flows | ÇAVDÊRÎKIRÎ |
| GRACE terrestrial water storage | Groundwater and storage change | ÇAVDÊRÎKIRÎ |
| FAO AQUASTAT | Withdrawals by sector | TEXMÎNKIRÎ |
| Basin model outputs | Scenario flows | MODELKIRÎ |
Sê malbatên amûran li kêleka hev li hember xeta bingehîn, her yek bi derengmayîn û leza pejirandina xwe, di bin pêwîstî û lihevhatina ku hûn diyar dikin; mezinahiya bandorê nirxên hînkirinê ne û divê bi delîlan bên guhertin. Senaryo: texmînên bi nav ên li ser pêşerojê, ne pêşbînî. Nexşeya vê rûpelê Andan nîşan dide; modela bixwe bi cihekî ve girêdayî nîne.
Kontrol
Xwendin
| Sal | Xeta bingehîn | Defences and storage | Land-use rules | Warnings and preparedness |
|---|---|---|---|---|
| 0 | 100.0 | 99.7 | 98.9 | 98.7 |
| 1 | 102.0 | 101.5 | 100.4 | 98.7 |
| 2 | 104.0 | 103.1 | 101.8 | 97.5 |
| 3 | 106.1 | 104.4 | 102.8 | 96.8 |
| 4 | 108.2 | 105.2 | 103.6 | 97.5 |
| 5 | 110.4 | 105.2 | 104.1 | 99.0 |
| 6 | 112.6 | 104.4 | 104.3 | 100.9 |
| 7 | 114.9 | 102.7 | 104.3 | 102.8 |
| 8 | 117.2 | 100.6 | 104.3 | 104.9 |
| 9 | 119.5 | 98.9 | 104.4 | 107.0 |
| 10 | 121.9 | 97.9 | 104.7 | 109.1 |
| 11 | 124.3 | 97.9 | 105.3 | 111.3 |
| 12 | 126.8 | 98.6 | 106.3 | 113.5 |
| 13 | 129.4 | 99.8 | 107.6 | 115.8 |
| 14 | 131.9 | 101.3 | 109.1 | 118.1 |
| 15 | 134.6 | 103.1 | 110.8 | 120.5 |
| 16 | 137.3 | 105.0 | 112.7 | 122.9 |
| 17 | 140.0 | 107.0 | 114.8 | 125.3 |
| 18 | 142.8 | 109.1 | 116.9 | 127.8 |
| 19 | 145.7 | 111.3 | 119.1 | 130.4 |
| 20 | 148.6 | 113.5 | 121.4 | 133.0 |
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:
Li seranserê şeş stûnan, bi pêşengiya Nexus Consortium
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.
| Kontrol bikin | How it is done |
|---|---|
| Record length and gaps | Flow statistics state record length, gaps and how they were filled |
| Model calibration | Basin models are calibrated and validated on separate periods |
| Non-stationarity | Trends are tested before historical statistics are used for future allocation |
Assumptions of stationarity weaken as climate and land use change. Ungauged basins, karst aquifers and rapid urbanisation are poorly represented by parameters fitted elsewhere.
The chain from an impact model to an evaluated early action, each step with the pillar that runs it, and the decisions that stay with the authorities. Teaching model with stated illustrative values, not a prediction. The map on this page shows The Andes; the model itself is not tied to a place.
Li seranserê şeş stûnan, bi pêşengiya Nexus Consortium
Assembled from the Nexus Standards area profile Lihevhatina avhewa û xetera veguhestinê: the hazards it names, the pergalên and communities that carry the loss, the controls and institutions that dampen it and the data that observe it. Pick an initiating event and step through the cascade to see where mandates meet and which decisions fall to whom. The Map view places the run on an example geography with open data. Every weight is a stated assumption. An exercise for dialogue, not a forecast, an assessment or a position. To model a place of your own choosing, open the full System Builder.
Metirsî
Pergal û girêdan
Kontrol
NS-0 Destûr û prensîbNS-3 UNIyên tomara xetereyê (rêzimanî, nexşeya veguhastina ji pergala kevin, desthilata veqetandinê)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)NS-14 Lihevhatin û nexşeya li standardên derveyîNRS-X1 Xetera guherîna avhewayê û lihevhatinNRS-T16 Xetera ajanên AI û pergalên biryardanê yên xweserNRS-H65 Malbata metirsiyê: Binpêkirinên sînorên gerstêrkê (NHS-1 planet.boundary)NRS-I7 Sepanên îstîxbaratê: dîtina bi bingeh, ramandin û piştgiriya biryarêNRS-K20 Profîla pakêta domainê: Lihevhatina avhewayê (DOMAIN-020)NRS-K21 Profîla pakêta domainê: Sivikkirina avhewayê û karbon (DOMAIN-021)Çavdêrî
Erdnîgariya mînakê
Water Nexus stewards hydrology and water science for the Consortium and reviews how it is applied across platforms.
The sectors a policy on hydrology and water science for climate and nature governance has to coordinate: a choice in one ministry lands in the others.
Îmze
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
Amûr, mandat, aktor û rêkxistinên berpirsiyariyê yên ku siyasetmedar, dîplomat an ajansek pêşveçûnê pê re dixebite, bi navkirina lihevkirinên ku wan datînin. Avahî li gorî çarçoveyên hatine nav kirin in. Her rewş an pêşketina hatî kişandin nimûneyî ye, ne tomar e.
The agreements that set mandates and commitments on hydrology and water science for climate and nature governance, from adoption to their current horizon.
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.
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