Richards equation

non-linear partial differential equation that represents the movement of water in unsaturated soils
Intangible formula Q2151066
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Richards equation

Summary

Richards equation is a formula[1]. It draws 60 Wikipedia views per month (formula category, ranking #96 of 501).[2]

Key Facts

  • Richards equation's instance of is recorded as formula[3].
  • Lorenzo A. Richards is named after Richards equation[4].
  • Richards equation's has part is recorded as hydraulic conductivity[5].
  • Richards equation's has part is recorded as water content[6].
  • Richards equation's has part is recorded as elevation[7].
  • Richards equation's has part is recorded as time[8].
  • Richards equation's Freebase ID is recorded as /m/0h73fl[9].
  • Richards equation's defining formula is recorded as \frac{\partial \theta}{\partial t}= \frac{\partial}{\partial z} \left[ K(\theta) \left (\frac{\partial h}{\partial z} + 1 \right) \right][10].
  • Richards equation's maintained by WikiProject is recorded as WikiProject Mathematics[11].
  • Richards equation's Microsoft Academic ID is recorded as 103272765[12].
  • Richards equation's OpenAlex ID is recorded as C103272765[13].
  • Richards equation's Encyclopedia of China is recorded as 90482[14].
  • Richards equation's Encyclopedia of China is recorded as 138886[15].

Why It Matters

Richards equation draws 60 Wikipedia views per month (formula category, ranking #96 of 501).[2] It has Wikipedia articles in 7 language editions, a strong signal of global cultural recognition.[16]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] . wikidata.org.
  2. [4] . wikidata.org.
  3. [5] . wikidata.org.
  4. [6] . wikidata.org.
  5. [7] . wikidata.org.
  6. [8] . wikidata.org.
  7. [9] . Freebase Data Dumps. wikidata.org.
  8. [10] . wikidata.org.
  9. [11] . wikidata.org.
  10. [12] . wikidata.org.
  11. [13] . OpenAlex. Retrieved . docs.openalex.org. Provenance: wikidata.org.
  12. [14] . wikidata.org.
  13. [15] . wikidata.org.

Class ancestry

  1. [1] . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [16] . Wikidata sitelinks. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). Richards equation. Retrieved May 3, 2026, from https://4ort.xyz/entity/richards-equation
MLA “Richards equation.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/richards-equation.
BibTeX @misc{4ortxyz_richards-equation_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Richards equation}}, year = {2026}, url = {https://4ort.xyz/entity/richards-equation}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Richards equation — https://4ort.xyz/entity/richards-equation (retrieved 2026-05-03)

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