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API · /runoff-api

Stormwater Runoff API

salutare 4,516 Abbonati

Stormwater-runoff civil-engineering maths as an API, computed locally and deterministically. The rational endpoint computes the peak runoff from a catchment with the Rational Method, Q = C·i·A — in metric form Q(m³/s) = C·i·A/360 with rainfall intensity i in mm/h and area A in hectares, or in US form Q(cfs) = C·i·A with intensity in in/h and area in acres — where the runoff coefficient C is the fraction of rain that runs off (about 0.9 for paving and 0.2 for lawns). The time-of-concentration endpoint computes how long water takes to flow from the most remote point of the catchment to the outlet with the Kirpich formula, tc = 0.0195·L^0.77·S^(−0.385) minutes, from the flow-path length and slope; this sets the design-storm duration. The detention endpoint gives a first-order estimate of the detention-pond storage needed to throttle a peak inflow down to an allowable outflow over a storm duration, (Q_in − Q_out)·duration. Coefficients are dimensionless, intensities in mm/h or in/h, areas in ha or acres, lengths in m and flows in m³/s. Everything is computed locally and deterministically, so it is instant and private. Ideal for civil-engineering, drainage, urban-planning, landscape and flood-risk app developers, sewer-sizing and detention tools, and hydrology education. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is stormwater runoff; for open-channel flow use a Manning API and for pipe friction a Darcy API.

#stormwater #runoff #rational-method #hydrology #civil #developer-tools
api.oanor.com/runoff-api
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/api/runoff-api/openapi.json
/api/runoff-api/llms.txt

Individuazione: GET /api/index.json elenca ogni API.

API salute

salutare
Tempo di attività
100.00%
Sondaggi del server · 24 ore su 24
Latenza media
88 ms
Sondaggi del server · 24 ore su 24
Abbonati
4,516
attiva
Chiamate totali
24
ultimi 7 giorni
status Pagina di stato completa → · 20 sonde/24h

Prezzi

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Free

Gratis

  • 2,480 chiamate/mese
  • 2 richieste/secondo
  • Tetto rigido (429 sopra la quota, nessuna eccedenza)
  • 2,480 calls/month
  • 2 req/sec
  • Rational + time of concentration + detention
  • No credit card
Accedi per abbonarti

Starter

€9.00 /mese

  • 38,000 chiamate/mese
  • 6 richieste/secondo
  • Tetto rigido (429 sopra la quota, nessuna eccedenza)
  • 38,000 llamadas/mes
  • 6 solicitudes/seg
  • Unidades métricas y estadounidenses, Kirpich tc
  • Soporte por correo electrónico
Accedi per abbonarti

Pro

€24.00 /mese

  • 244,000 chiamate/mese
  • 15 richieste/secondo
  • Tetto rigido (429 sopra la quota, nessuna eccedenza)
  • 244,000 calls/month
  • 15 req/sec
  • Drainage & detention-pond pipelines
  • Priority support
Accedi per abbonarti

Mega

€73.00 /mese

  • 1,650,000 chiamate/mese
  • 40 richieste/secondo
  • Tetto rigido (429 sopra la quota, nessuna eccedenza)
  • 1,650,000 llamadas/mes
  • 40 req/seg
  • Escala de plataforma
  • SLA dedicado
Accedi per abbonarti

Costruito da

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PremiumApi

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Weir Flow API

Weir flow maths for open-channel discharge measurement as an API, computed locally and deterministically. The rectangular endpoint computes the flow over a rectangular sharp-crested weir, Q = (2/3)·Cd·b·√(2g)·H^1.5, from the crest width and the head of water above the crest — and solves the head back from a known discharge. The vnotch endpoint computes the flow over a triangular V-notch weir, Q = (8/15)·Cd·√(2g)·tan(θ/2)·H^2.5, from the notch angle and head, the most accurate weir for small flows because the discharge varies with the head to the power 2.5. The broadcrested endpoint computes the flow over a broad-crested weir, Q = Cd·(2/3)^1.5·√g·b·H^1.5 ≈ Cd·1.705·b·H^1.5, the rugged field structure used for river gauging. Each device carries its standard discharge coefficient (rectangular 0.62, V-notch 0.58, broad-crested 0.85) which you can override, and each solves either the discharge from a measured head or the head required for a target discharge. Everything is computed locally and deterministically, so it is instant and private. Ideal for hydrology, irrigation and civil-engineering tools, flow gauging in channels and treatment plants, stormwater and water-resource apps, and fluid-mechanics education. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is weir overflow discharge; for uniform open-channel flow use a Manning API and for differential-pressure pipe metering use an orifice API.

api.oanor.com/weir-api

Flood & River Discharge API

Global river-discharge and flood forecasting as an API, powered by the GloFAS (Global Flood Awareness System) model via Open-Meteo. For any coordinate on Earth, get a daily river-discharge forecast of up to 30 days — with the ensemble spread (mean, max and min across forecast members) so you can gauge uncertainty — plus up to 90 days of recent discharge history, and a quick current-situation summary with today's discharge and a 7-day outlook (peak day, max/min and rising/falling/stable trend). Discharge is reported in cubic metres per second. Ideal for flood early-warning and monitoring, insurance and reinsurance risk, agriculture and irrigation planning, hydropower, and environmental research. Data covers modelled rivers worldwide (none over open ocean). Open data via Open-Meteo / GloFAS.

api.oanor.com/flood-api

USGS Streamflow API

Live river and stream conditions from the USGS Water Services network. The catalogue of 16,900+ active US streamflow gauges is searchable by name, state or coordinate; the live endpoint returns the latest observation for any gauge: streamflow / discharge (in cubic feet per second and m³/s) and gauge height (in feet and metres), with the station name, observation time and coordinates. Find the gauges nearest any lat/lon. Ideal for flood monitoring, hydrology, whitewater/fishing & recreation apps, drought tracking and environmental dashboards.

api.oanor.com/streamflow-api

Equine Care API

Pferdepflege-Mathematik als API, lokal und deterministisch berechnet – die alltäglichen Zahlen, die ein Pferdebesitzer, Stallmanager oder Tierarzthelfer berechnet, ohne nach einer Tabelle greifen zu müssen. Der Gewichts-Endpoint schätzt das Körpergewicht aus einer Gewichtsbandmessung mit der klassischen Formel Gewicht ≈ Brustumfang² × Körperlänge ÷ einem Typ-Divisor (erwachsen 330, Jährling 301, Absetzer 280, Pony 299) mit Maßen in Zoll – ein Pferd mit 72 Zoll Brustumfang und 66 Zoll Länge ergibt etwa 1.037 lb (470 kg), die Zahl, nach der Sie tatsächlich Wurmkur und Futter dosieren. Der Futter-Endpoint setzt Körpergewicht und ein Ziel in tägliches Raufutter um: Pferde fressen etwa 1,5–2,5 % ihres Körpergewichts an Trockenmasse-Raufutter pro Tag, also ein 1.000 lb schweres Pferd zur Erhaltung benötigt etwa 15–20 lb Heu, mehr zum Zunehmen und weniger zum Abnehmen. Der Trächtigkeits-Endpoint gibt das voraussichtliche Fohlen-Datum und das normale 320–362-Tage-Fenster aus einem Deckdatum – eine Stute, die am 1. April gedeckt wurde, ist um den 7. März des nächsten Jahres fällig, plus/minus drei Wochen. Alles wird lokal und deterministisch berechnet, also sofort und privat. Ideal für Stallmanagement- und Pferdepflege-Apps, Zucht- und Fohlen-Tracker, Futterrechner- und Sattelkammer-Websites sowie equine Tierarzt-Tools. Reine lokale Berechnung – kein Key, kein Drittanbieter-Service, sofort. Live, nichts gespeichert. 3 Compute-Endpoints. Bildungsbezogene Schätzungen – kein tierärztlicher Rat.

api.oanor.com/equine-api

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Come ottengo una chiave API per Stormwater Runoff API?
Registrati gratuitamente su oanor.com, genera una chiave API dalla dashboard sviluppatore e chiama Stormwater Runoff API con l'header x-oanor-key. Nessuna carta di credito richiesta per il piano gratuito.
Qual è il limite di velocità di Stormwater Runoff API?
Il piano gratuito consente 1 richiesta al secondo. I piani a pagamento arrivano fino a 50 richieste al secondo nel piano Mega. I limiti rigorosi restituiscono HTTP 429 oltre la quota — nessuna spesa imprevista.
Quanto costa Stormwater Runoff API?
Stormwater Runoff API ha un piano gratuito con 100 chiamate / mese. I piani a pagamento partono da €9.00 / mese con quote più alte e limiti di velocità più rapidi.
Posso cancellare l'abbonamento in qualsiasi momento?
Sì. I piani sono fatturati mensilmente e puoi cancellare in qualsiasi momento dalla dashboard di fatturazione. Nessun contratto a lungo termine e nessuna penale di cancellazione.
Stormwater Runoff API è conforme al GDPR?
Tutte le richieste a Stormwater Runoff API passano attraverso il nostro gateway in UE. La tua chiave upstream non lascia mai il nostro server e nessun dato personale viene condiviso con il fornitore upstream oltre alla richiesta inviata.

Scegli un endpoint dall'elenco a sinistra per visualizzarne i dettagli e provarlo.

Frammenti di codice

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curl https://api.oanor.com/runoff-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/runoff-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/runoff-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);
import requests
r = requests.get(
    "https://api.oanor.com/runoff-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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