Effect of rainfall on some water denotation of soil

Daood Aga, Moatasim

doi:10.58928/ku14.05210

	Effect of rainfall on some water denotation of soil
Kirkuk University Journal for Agricultural Sciences (KUJAS)
Article 1, Volume 5, Issue 2, 2014, Pages 55-66 PDF (828.7 K)
Document Type: Research Paper
DOI: 10.58928/ku14.05210
Author
Moatasim Daood Aga
Abstract
Field experiment was conducted to study some physical properties and mois- ture content along the 1.5 m depth of the soils profile with a texture of clay (Cl.) and sandy loam (S.L.), under the influence of the depth , intensity and sustain- ability of rainfall alternating. The results of the study for the rainy season (Oct- ober, November, December, January, February, March and April) for the seasons (2011-2012) and (2012-2013), describes climate data that depth rainfall for the second season twice the first season and consequently the most water relations and hydrological was more effective in this season. The depth of the wetting front increased gradually until the month of January with sharply deviation towards the end of the rainy season, the depth of hydration (above primary moisture content) for S.L. soil largest over 10% and the content of moisture equivalent middle of what is in the Cl. soil. In the first season most values of moisture content for the soil surface located within the available moisture content, while exceeded that in the second season of approaching and as many as 80% of the value of saturated moisture content for both soils study. S.L. soil gave values of constant Infiltration Capacity (Infiltration Index) that is higher than in the Cl. Soil, Infiltration Index can be applied with using the data intensity rain to calculate the depth of runoff, runoff can also be calculated from a prior relationship between rainfall and runoff (runoff coefficient). Surplus water appears more pronounced in the second season, especially in the month of January than in the first season.

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