Thesis
Soil moisture and temperature impacts on adjacent soils from permeable pavement systems
Washington State University
Master of Science (MS), Washington State University
2016
Handle:
https://hdl.handle.net/2376/103076
Abstract
When considering a permeable pavement with an underground storage bed as a potential highway shoulder, an important issue is how this system might impact temperature and moisture in neighboring soils below mainline pavements as might further affect pavements or infrastructures installed above. This study investigated temperature and moisture fluctuations in soils next to two permeable pavement systems with retention and detention functions in eastern Washington during Winter 2015/2016 by means of sensoring the neighboring clay soils at two rows and three depths. The findings for the permeable system with detention function showed that there was no negative impact on the soil temperature and the soil moisture by the permeable pavement system, with the closer sensors usually being slightly drier and warmer than those located farther away. In addition, the sensors recorded neither a temperature below freezing nor a moisture content above the saturation level. For permeable pavement with a retention function, it was observed that during periods of precipitation, the soil near the retention bed cooled off and then warmed back up faster than soils farther away. The soils near the retention system at depths above the grade of the storage bed tended to remain drier than those soils farther away, while closer soils below the bottom of the bed had higher moisture content than those farther away. Therefore, a deeper storage bed is recommended to avoid additional water or colder temperatures on neighboring soils in retention type permeable pavements. Also, none of the soil temperature readings dropped below freezing nor did the soil moisture readings exceed the saturation level. Finally, the performance of the system under dry-warm conditions showed a considerable trend in the cooling period as the closer soils heat faster and cool slower than farther soils. The results of the artificial flooding tests indicated that despite the high residual soil moisture after the wet season, the draindown rate of the soil-permeable pavement system was high and the stored waters drained in a few hours. Since Winter 2015/2016 was a relatively mild winter in the area, additional research under colder conditions is warranted to understand applicable design depths.
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Details
- Title
- Soil moisture and temperature impacts on adjacent soils from permeable pavement systems
- Creators
- Mina Yekkalar
- Contributors
- Balasingam Muhunthan (Degree Supervisor)Liv Haselbach (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Civil and Environmental Engineering, Department of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525120901842
- Language
- English
- Resource Type
- Thesis