Effects of Turfgrass Thatch on Water Infiltration, Surface Runoff, and Evaporation  

作　　者：Xi Liang Derong Su Zhi Wang Xin Qiao 

机构地区：[1]Research Center of Grassland Ecology and Resources, Beijing Forestry University, Beijing, China [2]Department of Plant, Soil and Entomological Sciences, University of Idaho, Aberdeen Research and Extension Center, Aberdeen, USA [3]Institute of Water and Development, Chang’an University, Xi’an, China [4]Department of Earth and Environmental Sciences, California State University, Fresno, USA [5]Department of Biological Systems Engineering, University of Nebraska-Lincoln, Panhandle Research and Extension Center, Scottsbluff, USA

出　　处：《Journal of Water Resource and Protection》2017年第7期799-810,共12页水资源与保护（英文）

摘　　要：The development of a (layer of) thatch in turfgrass causes important changes to near-surface eco-hydrological processes. In this study, we investigated the effects of turfgrass thatch, specifically Kentucky bluegrass (Poa pratensis L.) and red fescue (Festuca rubra L.) on water infiltration, surface runoff, and soil moisture evaporation. The thatches were collected from the field for controlled experiments using packed soil columns under various rainfall conditions. Results indicated that the presence of thatch delayed the onset of infiltration compared with situations without a thatch at the soil surface. Infiltration was delayed for a longer period in thicker red fescue thatch than thinner Kentucky bluegrass thatch. The presence of a thatch reduced runoff by holding more water locally during the rainfall period and allowing a longer period of time for infiltration. Additionally, evaporative water loss was reduced with the presence of thatch than that of bare soil. Our results highlight that the presence of thatch changes the near-surface hydrological processes, which may help improve turf management practices in terms of thatch control and irrigation scheduling.The development of a (layer of) thatch in turfgrass causes important changes to near-surface eco-hydrological processes. In this study, we investigated the effects of turfgrass thatch, specifically Kentucky bluegrass (Poa pratensis L.) and red fescue (Festuca rubra L.) on water infiltration, surface runoff, and soil moisture evaporation. The thatches were collected from the field for controlled experiments using packed soil columns under various rainfall conditions. Results indicated that the presence of thatch delayed the onset of infiltration compared with situations without a thatch at the soil surface. Infiltration was delayed for a longer period in thicker red fescue thatch than thinner Kentucky bluegrass thatch. The presence of a thatch reduced runoff by holding more water locally during the rainfall period and allowing a longer period of time for infiltration. Additionally, evaporative water loss was reduced with the presence of thatch than that of bare soil. Our results highlight that the presence of thatch changes the near-surface hydrological processes, which may help improve turf management practices in terms of thatch control and irrigation scheduling.

关 键 词：TURFGRASS THATCH INFILTRATION RUNOFF EVAPORATIVE Water Loss 

分 类 号：R73[医药卫生—肿瘤]