{"uid":"cap_l5rdX9cRCz7WlxGC-oP-s","slug":"van-genuchten-mualem-retention-conductivity-moisture-capacity-evaluator-ceb249fe","name":"Van Genuchten–Mualem Retention, Conductivity & Moisture Capacity Evaluator","description":"Evaluate retention, conductivity and moisture capacity of a specified porous medium model.","url":"https://detect.halowerk.com/v1/F-TD2000-GEO-INDUSTRY-B008/van-genuchten-mualem-retention-conductivity-moisture-capacity?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"artifact":{"type":"object","required":["vanGenuchten"],"properties":{"vanGenuchten":{"type":"object","required":["data","claim"],"properties":{"data":{"type":"object","required":["residual_water_content","saturated_water_content","alpha_inverse_length","n","saturated_conductivity","pressure_heads"],"properties":{"n":{"type":"number","maximum":10,"minimum":1.01},"pressure_heads":{"type":"array","items":{"type":"number","maximum":0,"minimum":-1000000},"maxItems":32,"minItems":1},"alpha_inverse_length":{"type":"number","maximum":1000,"minimum":0.000001},"residual_water_content":{"type":"number","maximum":0.8,"minimum":0},"saturated_conductivity":{"type":"number","maximum":10000,"minimum":1e-12},"saturated_water_content":{"type":"number","maximum":1,"minimum":0.000001}},"additionalProperties":false},"claim":{}},"additionalProperties":false}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_r0PG9Rm7S2p2-5kn3uv_W","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes water retention curve, hydraulic conductivity, and moisture capacity for a porous medium using the van Genuchten–Mualem model at specified pressure heads.","exampleAgentPrompt":"Evaluate the van Genuchten–Mualem retention and hydraulic conductivity for a soil with residual water content 0.034, saturated water content 0.46, alpha 0.016 cm⁻¹, n 1.37, saturated conductivity 0.0035 m/day, at pressure heads of -10, -100, -500, and -1000 cm.","exampleUseCases":[{"title":"Soil hydraulic characterization for irrigation","prompt":"I have a silty loam soil with residual water content 0.067, saturated water content 0.45, alpha 0.02 per cm, n 1.41, and saturated conductivity 0.108 cm/day — can you compute the retention, conductivity, and moisture capacity at pressure heads from -1 to -10000 cm?"},{"title":"Vadose zone simulation parameter check","prompt":"Before I run my HYDRUS simulation, can you evaluate the van Genuchten–Mualem model for my sandy aquifer with θr=0.045, θs=0.43, alpha=0.145, n=2.68, Ks=712.8 cm/day at pressure heads of -5, -20, -50, -100, and -500 cm?"},{"title":"Geotechnical porous medium model validation","prompt":"I need to validate my porous medium model for a clay layer — parameters are residual water content 0.095, saturated water content 0.41, alpha 0.019, n 1.31, saturated hydraulic conductivity 0.00062 cm/day — please calculate retention, conductivity, and moisture capacity at -10, -50, -200, and -1000 cm pressure heads."}],"resultDescription":"Returns computed water retention (volumetric water content), unsaturated hydraulic conductivity, and moisture capacity (derivative of water content with respect to pressure head) for each specified pressure head, based on the van Genuchten–Mualem parametric model.","failureModes":["Invalid parameter ranges (e.g. n ≤ 1.01, alpha out of bounds) return validation errors","Pressure head values outside [-1,000,000, 0] are rejected","More than 32 pressure head values in array causes schema validation failure","Missing required van Genuchten parameters returns a 400-level error","Saturated water content below residual water content may cause computation errors"],"whenToPreferThis":"Use this endpoint when you need a fast, deterministic computation of van Genuchten–Mualem soil hydraulic properties (retention, conductivity, moisture capacity) at specific pressure heads without setting up a local numerical solver. Ideal for validating soil parameterizations, populating lookup tables for simulation models, or integrating hydraulic property evaluation into agentic geotechnical or hydrological workflows.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-11-04T06:36:44.652Z","isFirstParty":false,"canonicalSlug":"van-genuchten-mualem-retention-conductivity-moisture-capacity-evaluator-ceb249fe"}