Managing Global Resources for a Secure Future

2017 Annual Meeting | Oct. 22-25 | Tampa, FL

279-9 Simulating Stony Soil Impact on Evapotranspiration.

Poster Number 1247

See more from this Division: SSSA Division: Soil Physics and Hydrology
See more from this Session: Soil Physics and Hydrology Division Student Competition, Part 2 - Posters

Tuesday, October 24, 2017
Tampa Convention Center, East Exhibit Hall

Kshitij Parajuli1, Scott B. Jones2, David Tarboton1, LIn Zhao2 and Gerald N. Flerchinger3, (1)Civil and Environmental Engineering, Utah State University, Logan, UT
(2)Department of Plants, Soils and Climate, Utah State University, Logan, UT
(3)USDA-ARS, Boise, ID
Poster Presentation
  • SSSA_Meeting_Tampa_2017[Final].pdf (446.7 kB)
  • Abstract:
    Few studies of evapotranspiration are made in natural vegetation ecosystems as compared to agricultural settings. Forest soils in many locations are dominated by high stone content, affecting the hydraulic soil properties. Variable soil hydraulic properties greatly complicate the understanding and simulation of water and energy fluxes within the land surface and the atmosphere. In this study the Hydrus-1D numerical model was employed to simulate evapotranspiration (ET) from stony soil. Two different scenarios for stony soils were simulated assuming highly porous- (porosity = 35%) and negligibly porous- ( porosity = 3%) stones in the soil. Simulated ET was overestimated compared to eddy covariance measurements when neglecting stone content, while accounting for stones substantially reduced simulated cumulative ET due to the reduced bulk soil water retention.

    See more from this Division: SSSA Division: Soil Physics and Hydrology
    See more from this Session: Soil Physics and Hydrology Division Student Competition, Part 2 - Posters