File Download
There are no files associated with this item.
Links for fulltext
(May Require Subscription)
- Publisher Website: 10.1016/j.ecoleng.2012.06.020
- Scopus: eid_2-s2.0-84864053206
- WOS: WOS:000309433600002
- Find via
Supplementary
- Citations:
- Appears in Collections:
Article: Substrate moisture effect on water balance and thermal regime of a tropical extensive green roof
Title | Substrate moisture effect on water balance and thermal regime of a tropical extensive green roof |
---|---|
Authors | |
Keywords | Green roof Mass effects Moisture storage Thermal performance Water depletions |
Issue Date | 2012 |
Publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/ecoleng |
Citation | Ecological Engineering, 2012, v. 47, p. 9-23 How to Cite? |
Abstract | Green-roof thermal and hydrological performance has been extensively studied, but the specific effect of substrate moisture has received little attention. This study investigates the substrate moisture effect on evapotranspiration (ET), water balance and subaerial and subsurface temperatures of an extensive tropical green roof. Firstly, three weather types (sunny, cloudy and rainy) in conjunction with three substrate moisture states (wet, moist and dry) generate nine permutations for a scenario analysis. Secondly, the correlation analysis explores the relationship between substrate moisture and thermal performance indicators. The major finding is that substrate moisture is effective in regulating substrate thermal behavior, but less so in enhancing ET and associated cooling. Substrate moisture can notably cool the soil, rockwool and concrete tile on sunny days, and warm them on cloudy and rainy days. In contrast, substrate moisture has limited effect on ET, which is largely dependent on solar radiation, relative humidity and wind speed. The dry substrate on sunny day demonstrates an aberrant behavior of high ET which contradicts with previous studies. This unusual phenomenon is explained by the limited substrate mass effect of the thin extensive green roof. The vegetation surface and air temperatures show little variations between different soil moisture states, and their correlations with substrate moisture are insignificant. The findings could provide an additional substrate moisture dimension to enhance the design and management of green roofs with reference to water and thermal behavior. © 2012 Elsevier B.V. |
Persistent Identifier | http://hdl.handle.net/10722/164783 |
ISSN | 2023 Impact Factor: 3.9 2023 SCImago Journal Rankings: 1.051 |
ISI Accession Number ID |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Jim, CY | en_US |
dc.contributor.author | Peng, LLH | en_US |
dc.date.accessioned | 2012-09-20T08:09:23Z | - |
dc.date.available | 2012-09-20T08:09:23Z | - |
dc.date.issued | 2012 | en_US |
dc.identifier.citation | Ecological Engineering, 2012, v. 47, p. 9-23 | en_US |
dc.identifier.issn | 0925-8574 | - |
dc.identifier.uri | http://hdl.handle.net/10722/164783 | - |
dc.description.abstract | Green-roof thermal and hydrological performance has been extensively studied, but the specific effect of substrate moisture has received little attention. This study investigates the substrate moisture effect on evapotranspiration (ET), water balance and subaerial and subsurface temperatures of an extensive tropical green roof. Firstly, three weather types (sunny, cloudy and rainy) in conjunction with three substrate moisture states (wet, moist and dry) generate nine permutations for a scenario analysis. Secondly, the correlation analysis explores the relationship between substrate moisture and thermal performance indicators. The major finding is that substrate moisture is effective in regulating substrate thermal behavior, but less so in enhancing ET and associated cooling. Substrate moisture can notably cool the soil, rockwool and concrete tile on sunny days, and warm them on cloudy and rainy days. In contrast, substrate moisture has limited effect on ET, which is largely dependent on solar radiation, relative humidity and wind speed. The dry substrate on sunny day demonstrates an aberrant behavior of high ET which contradicts with previous studies. This unusual phenomenon is explained by the limited substrate mass effect of the thin extensive green roof. The vegetation surface and air temperatures show little variations between different soil moisture states, and their correlations with substrate moisture are insignificant. The findings could provide an additional substrate moisture dimension to enhance the design and management of green roofs with reference to water and thermal behavior. © 2012 Elsevier B.V. | - |
dc.language | eng | en_US |
dc.publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/ecoleng | en_US |
dc.relation.ispartof | Ecological Engineering | en_US |
dc.subject | Green roof | - |
dc.subject | Mass effects | - |
dc.subject | Moisture storage | - |
dc.subject | Thermal performance | - |
dc.subject | Water depletions | - |
dc.title | Substrate moisture effect on water balance and thermal regime of a tropical extensive green roof | en_US |
dc.type | Article | en_US |
dc.identifier.email | Jim, CY: hragjcy@hku.hk | en_US |
dc.identifier.authority | Jim, CY=rp00549 | en_US |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.ecoleng.2012.06.020 | - |
dc.identifier.scopus | eid_2-s2.0-84864053206 | - |
dc.identifier.hkuros | 207811 | en_US |
dc.identifier.volume | 47 | en_US |
dc.identifier.spage | 9 | en_US |
dc.identifier.epage | 23 | en_US |
dc.identifier.isi | WOS:000309433600002 | - |
dc.publisher.place | Netherlands | - |
dc.identifier.citeulike | 11610374 | - |
dc.identifier.issnl | 0925-8574 | - |