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Article: Effect of spatial variability of surface soil saturated hydraulic conductivity on water drainage at field scale

TitleEffect of spatial variability of surface soil saturated hydraulic conductivity on water drainage at field scale
Authors
KeywordsField Scale
Soil Saturated Hydraulic Conductivity
Spatial Variability
Stochastic Simulation
Water Drainage
Issue Date2006
Citation
Shuili Xuebao/Journal of Hydraulic Engineering, 2006, v. 37 n. 10, p. 1217-1223 How to Cite?
AbstractThe objective of this paper is to evaluate the effect of spatial variability of the surface soil saturated hydraulic conductivity(Ks) on water drainage. A conditional simulation (CS) method was used to get a random field of the surface soil Ks based on 117 observed values in the field. Then, a soil water movement model (HYDRUS-1D) was coupled with the random field of the surface soil Ks. During the period from March 10 to June 10, 1999, water drainage was stochastically simulated with the total water income being 353.8 mm(including 270mm irrigation rate). The accumulated quantities of the water drainage ranged from 23.73 mm to 64.73 mm in the soil profile 2 m in depth, accounting for about 8.8% and 24.0% of the irrigation rate during this period. The accumulated quantities of the water drainage were calculated by measured method, ordinary Kriging(OK) method and CS method, respectively. Their results were compared. It was found that the accumulated quantities of the water drainage obtained by CS method agreed well with that by the measured method, while the water drainage range was shortened by the OK method because of its obviously 'smoothing effect'. The effect of spatial variability of the surface soil Ks on water drainage could be reflected by the three methods and their results were all better than the traditional method, which does not consider the spatial variability of the surface soil Ks.
Persistent Identifierhttp://hdl.handle.net/10722/92142
ISSN
2015 SCImago Journal Rankings: 0.232

 

DC FieldValueLanguage
dc.contributor.authorHu, K-Len_HK
dc.contributor.authorLi, B-Gen_HK
dc.contributor.authorChen, Yen_HK
dc.date.accessioned2010-09-17T10:37:19Z-
dc.date.available2010-09-17T10:37:19Z-
dc.date.issued2006en_HK
dc.identifier.citationShuili Xuebao/Journal of Hydraulic Engineering, 2006, v. 37 n. 10, p. 1217-1223en_HK
dc.identifier.issn0559-9350en_HK
dc.identifier.urihttp://hdl.handle.net/10722/92142-
dc.description.abstractThe objective of this paper is to evaluate the effect of spatial variability of the surface soil saturated hydraulic conductivity(Ks) on water drainage. A conditional simulation (CS) method was used to get a random field of the surface soil Ks based on 117 observed values in the field. Then, a soil water movement model (HYDRUS-1D) was coupled with the random field of the surface soil Ks. During the period from March 10 to June 10, 1999, water drainage was stochastically simulated with the total water income being 353.8 mm(including 270mm irrigation rate). The accumulated quantities of the water drainage ranged from 23.73 mm to 64.73 mm in the soil profile 2 m in depth, accounting for about 8.8% and 24.0% of the irrigation rate during this period. The accumulated quantities of the water drainage were calculated by measured method, ordinary Kriging(OK) method and CS method, respectively. Their results were compared. It was found that the accumulated quantities of the water drainage obtained by CS method agreed well with that by the measured method, while the water drainage range was shortened by the OK method because of its obviously 'smoothing effect'. The effect of spatial variability of the surface soil Ks on water drainage could be reflected by the three methods and their results were all better than the traditional method, which does not consider the spatial variability of the surface soil Ks.en_HK
dc.languageengen_HK
dc.relation.ispartofShuili Xuebao/Journal of Hydraulic Engineeringen_HK
dc.subjectField Scaleen_HK
dc.subjectSoil Saturated Hydraulic Conductivityen_HK
dc.subjectSpatial Variabilityen_HK
dc.subjectStochastic Simulationen_HK
dc.subjectWater Drainageen_HK
dc.titleEffect of spatial variability of surface soil saturated hydraulic conductivity on water drainage at field scaleen_HK
dc.typeArticleen_HK
dc.identifier.emailChen, Y:ychenc@hkucc.hku.hken_HK
dc.identifier.authorityChen, Y=rp1318en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-33845896827en_HK
dc.identifier.volume37en_HK
dc.identifier.issue10en_HK
dc.identifier.spage1217en_HK
dc.identifier.epage1223en_HK

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