坡面表土飽和水力傳導度之推估

ESTIMATION OF SATURATED HYDRAULIC CONDUCTIVITY OF THE SURFACE SOIL ON THE LANDSLOPE PROFILE

林俐玲(Li-Ling Lin) ； 陳佩松(Pay-Song Chen)

《中華水土保持學報》 24卷2期 (1993/11) Pp. 119-130

https://doi.org/10.29417/JCSWC.199311_24(2).0012

摘要

飽和水力傳導度為土體運移水分之重要特性，亦為水土保持工作所需之重要參數。然其田間測量費時又有諸多不便，故本文嘗試由土壤其他易測性質推估之本文試驗採樣36點，分別以鋼環樣本與經磨碎，過篩之樣本測定其飽和水力傳導度，有機質含量，總體密度，顆粒密度與粒徑分布。經數據分析得下列結果：一、未擾動土體之飽和水力傳導度無法經擾動樣本飽和水力傳導度行線性推估。二，未擾動土體飽和水力傳導度之推估式如下：K = -0.000006927SA-0.000000666SA^2-0.00007920C -0.000001334C^2 + 0.001605O-0.000238O^2 + 0.356692P -0.065552P^2-0.085067B + 0.026874B^2-0.414842，R^2=0.6292，Prob = 0.0023式中K：飽和水力傳導度，（cm / sec）C：黏粒含量，（％）O：有機質含量，（％）SA：砂粒含量，（％）B：總體密度，（gm / cm^3）P：顆粒密度，（gm / cm^3）

關鍵字

飽和水力傳導度 ； 有損質含量 ； 總體密度 ； 顆粒密度 ； 粒徑分布

並列摘要

Saturated hydraulic conductivity is one of the most important characteristics in soil water transportation, and it is also an important parameter in soil and water conservation. Since laboratory and field measurement of soil hydraulic properties is time consuming, therefore, it is necessary and useful to develop simplified empirical models to estimate the saturated hydraulic conductivity of soils from other easily measurable soil physical properties. In this study a multiple linear regression model was developed to predict the saturated hydraulic conductivity of soils from their particle size distribution, organic matter content, bulk density and particle density data. The measured data of 36 soil core samples of varying soils from different location were used to developed the model. The predicted model is: K= -0.000006927SA-0.000000666SA^2-0.000079207C -0.000001334C^2+0.001605O-0.000238O^2+0.356692P -0.065552P^2-0.085067B+0.026874B^2-0.414812, R^2=0.6292, Prob=0.0023 where K: Saturated hydraulic conductivity, (cm/sec) C: Clay content, (%) O: Organic matter content, (%)SA: Sand content, (%) B: Bulk density, (gm/cm^3)P: Particle density, (gm/cm^3)

並列關鍵字

Saturated Hydraulic Conductivity ； Particle Size Distribution ； Organic Matter Content ； Bulk Density ； Particle Density