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Article: A study on the pH and conductivity of rural rainfall employing two collocated samplers

TitleA study on the pH and conductivity of rural rainfall employing two collocated samplers
Authors
Issue Date1999
PublisherAmerican Geophysical Union.
Citation
Water Resources Research, 1999, v. 35 n. 2, p. 535-540 How to Cite?
AbstractA set of about 100 daily rainfall samples were collected over a period of about one year during the 1995-1996 period using two collocated, automated samplers placed ~4 m apart at the rural Kadoorie Agricultural Research Centre (KARC) in Hong Kong. The pH and conductivity of the rainwater were measured immediately after sample collection. There is a strong correlation between the two free hydrogen ion concentrations (R2 ≃ 0.92) and an even stronger one between the conductivities (R2 ≃ 0.99). Statistically, there is no difference at the 0.05 level of significance between the means of either the two free hydrogen ion concentrations or the two conductivities. The conductivity results suggest that the total dissolved solids in the two samplers is probably quite similar in magnitude. No relationship is observed between thee free acid content and daily rainfall Volume in either sampler, a result similar to that obtained in previous studies involving bulk fall at the KARC and wet fall in urban Hong Kong as a whole. A weak hyperbolic relationship exists between the rainfall volume and the conductivity, and their log-log plot indicates only a somewhat weak inverse linear relationship, with correlation coefficients of -0.60 and -0.61 for the two samplers, considered individually. Finally, the unbiased estimates of the product of rainfall volume and conductivity for the collocated samples suggest that the microscale variability (≥4 m) of the mean wet mass flux of total dissolved material in rural Hong Kong rainfall is negligible.
Persistent Identifierhttp://hdl.handle.net/10722/86121
ISSN
2015 Impact Factor: 3.792
2015 SCImago Journal Rankings: 2.661
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorSequeira, Ren_HK
dc.contributor.authorLai, CCen_HK
dc.contributor.authorPeart, MRen_HK
dc.date.accessioned2010-09-06T09:13:08Z-
dc.date.available2010-09-06T09:13:08Z-
dc.date.issued1999en_HK
dc.identifier.citationWater Resources Research, 1999, v. 35 n. 2, p. 535-540en_HK
dc.identifier.issn0043-1397en_HK
dc.identifier.urihttp://hdl.handle.net/10722/86121-
dc.description.abstractA set of about 100 daily rainfall samples were collected over a period of about one year during the 1995-1996 period using two collocated, automated samplers placed ~4 m apart at the rural Kadoorie Agricultural Research Centre (KARC) in Hong Kong. The pH and conductivity of the rainwater were measured immediately after sample collection. There is a strong correlation between the two free hydrogen ion concentrations (R2 ≃ 0.92) and an even stronger one between the conductivities (R2 ≃ 0.99). Statistically, there is no difference at the 0.05 level of significance between the means of either the two free hydrogen ion concentrations or the two conductivities. The conductivity results suggest that the total dissolved solids in the two samplers is probably quite similar in magnitude. No relationship is observed between thee free acid content and daily rainfall Volume in either sampler, a result similar to that obtained in previous studies involving bulk fall at the KARC and wet fall in urban Hong Kong as a whole. A weak hyperbolic relationship exists between the rainfall volume and the conductivity, and their log-log plot indicates only a somewhat weak inverse linear relationship, with correlation coefficients of -0.60 and -0.61 for the two samplers, considered individually. Finally, the unbiased estimates of the product of rainfall volume and conductivity for the collocated samples suggest that the microscale variability (≥4 m) of the mean wet mass flux of total dissolved material in rural Hong Kong rainfall is negligible.en_HK
dc.languageengen_HK
dc.publisherAmerican Geophysical Union.en_HK
dc.relation.ispartofWater Resources Researchen_HK
dc.rightsWater Resources Research. Copyright © American Geophysical Union.en_HK
dc.titleA study on the pH and conductivity of rural rainfall employing two collocated samplersen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0043-1397&volume=35&issue=2&spage=535&epage=540&date=1999&atitle=A+study+on+the+pH+and+conductivity+of+rural+rainfall+employing+two+collocated+samplersen_HK
dc.identifier.emailPeart, MR:mrpeart@hkucc.hku.hken_HK
dc.identifier.authorityPeart, MR=rp00612en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1029/1998WR900021en_HK
dc.identifier.scopuseid_2-s2.0-0032950572en_HK
dc.identifier.hkuros45407en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0032950572&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume35en_HK
dc.identifier.issue2en_HK
dc.identifier.spage535en_HK
dc.identifier.epage540en_HK
dc.identifier.isiWOS:000078220800017-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridSequeira, R=7005141855en_HK
dc.identifier.scopusauthoridLai, CC=7403086361en_HK
dc.identifier.scopusauthoridPeart, MR=7003362850en_HK

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