|
ИСТИНА |
Войти в систему Регистрация |
Интеллектуальная Система Тематического Исследования НАукометрических данных |
||
II/17: Micro-Tomographic Method of Studying and Assessment of Soil Structure. 79-84 Chapter II/17: Micro-Tomographic Method of Studying and Assessment of Soil Structureстатья
- Автор: Chapter
- Сборник: Micro-Tomographic Method of Studying and Assessment of Soil Structure
- Серия: Micro-Tomographic Method of Studying and Assessment of Soil Structure
- Глава в коллективной монографии
- Год издания: 2018
- Место издания: DOI 10.25680/1044.2018.79.91.114
- Первая страница: 79
- Последняя страница: 84
- DOI: 10.25680/1044.2018.79.91.114
- Аннотация: Particle Size Distribution (PSD) is the main predictor variable used in pedotransfer functions (PTFs). Recently, laser diffraction method is widely used for particle size distribution measurement. Sedimentation methods are reported to yield higher values of silt and clay fractions, due to uneven distribution of solid phase density in different granulometric fractions. In heavy clay soils with high organic matter content, there is a multiple difference in grain density that can cause serious errors in the using PTFs. The aim of the paper is to validate the usage of laser diffraction method instead of pipette method for estimation soil water and heat transfer, using PTFs. Soil saturated hydraulic conductivity (KS) and soil thermal diffusivity (KD) were measured by the direct and PTFs methods. The calculated PTFs were based on PSD measured by laser diffraction method (LDM) and by pipette method (PM). Saturated hydraulic conductivity (KSPM) and thermal diffusivity (KPM) were calculated by PM. But KSLDM and KLDM were calculated by LDM, using PTFs. The results observed that R2 for KSPM and KPM were 0.94 and 0.90, were higher than R2 for KSLDM and KLDM which were 0.855 and 0.835 respectively. However, RMSE for KSLDM and KLDM were lower than RMSE for KSPM and KPM. LDM technique is the powerful method for measuring particle size distribution. It can be successfully used for estimation soil hydraulic properties and soil thermal parameters, without any modification or recalculations for silty loam and silty clay loam soils under study. Keywords: Soil Particle size distribution, Laser diffraction method, pipette method, Pedotransfer function, (PTFs), saturated hydraulic conductivity and Thermal diffusivity.
- Добавил в систему: Шеин Евгений Викторович