Citation
Ang L.H., . and Seel W.E., . and Mullins C., . Microclimate and water status of sand tailings at an ex-mining site in Peninsular Malaysia. pp. 157-170. ISSN 0128-1283
Abstract
ANG L.H. SEEL W.E. AND MULLINS C. 1999. Microclimate and water status of sand tailings at an ex-mining site in Peninsular Malaysia. Experimental plots each of size of 12 x 7.5 m were established on sand tailings at an ex-mining site in Peninsular Malaysia at 8 m above the standing water-table level (a.s.w.l.) (open and shade plots) and at 2.5 m a.s.w.l. (open plot only). The shade plot received about 45 per cent irradiance while the open plot received full irradiance. Acacia mangium and A. auriculiformis seedlings were planted in both plots at 0.75 x 0.75 m spacing. Shading reduced air temperature raised relative humidity (RH) and decreased air vapour pressure deficit (VPD subscript air). The results of 195 daily recordings of water-table levels in 3-m depth dipwells showed that ground water supply was limited at the site. The suction of sandat 0-15cm depth at 1 3 and 6 days after rainfall (more than 37mm per day) showed that the sand tailings at 8m a.s.w.l. dried rapidly from 3 to 6 days after rainfall. Days of available sand water (DAW) for A. mangium and A. auriculiformis were estimated based on root depths of each species and water release characteristics of the sand tailings. The DAW values for 9-month-old A. mangium and A. auriculiformis were 6 and 11 days respectively.
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Abstract
ANG L.H. SEEL W.E. AND MULLINS C. 1999. Microclimate and water status of sand tailings at an ex-mining site in Peninsular Malaysia. Experimental plots each of size of 12 x 7.5 m were established on sand tailings at an ex-mining site in Peninsular Malaysia at 8 m above the standing water-table level (a.s.w.l.) (open and shade plots) and at 2.5 m a.s.w.l. (open plot only). The shade plot received about 45 per cent irradiance while the open plot received full irradiance. Acacia mangium and A. auriculiformis seedlings were planted in both plots at 0.75 x 0.75 m spacing. Shading reduced air temperature raised relative humidity (RH) and decreased air vapour pressure deficit (VPD subscript air). The results of 195 daily recordings of water-table levels in 3-m depth dipwells showed that ground water supply was limited at the site. The suction of sandat 0-15cm depth at 1 3 and 6 days after rainfall (more than 37mm per day) showed that the sand tailings at 8m a.s.w.l. dried rapidly from 3 to 6 days after rainfall. Days of available sand water (DAW) for A. mangium and A. auriculiformis were estimated based on root depths of each species and water release characteristics of the sand tailings. The DAW values for 9-month-old A. mangium and A. auriculiformis were 6 and 11 days respectively.
Additional Metadata
| Item Type: | Article |
|---|---|
| Additional Information: | Summaries (En Ms) |
| AGROVOC Term: | SAND |
| AGROVOC Term: | MICROCLIMATE |
| AGROVOC Term: | GROUNDWATER TABLE |
| AGROVOC Term: | WATER AVAILABILITY |
| AGROVOC Term: | WATER SUPPLY |
| AGROVOC Term: | ACACIA MANGIUM |
| AGROVOC Term: | ACACIA AURICULIFORMIS |
| AGROVOC Term: | PENINSULAR MALAYSIA ARENA |
| AGROVOC Term: | MICROCLIMA |
| AGROVOC Term: | CAPA FREATICA |
| Depositing User: | Ms. Norfaezah Khomsan |
| Last Modified: | 24 Apr 2025 05:52 |
| URI: | http://webagris.upm.edu.my/id/eprint/17852 |
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