ring size dependence of field saturated hydraulic conductivity measurements in a clay loam soil

Authors

هیوا خانی چراغبدال

دانشگاه ارومیه حبیب خداوردیلو

دانشگاه ارومیه حسین عسگرزاده

دانشگاه ارومیه شجاع قربانی دشتکی

انشگاه شهرکرد

abstract

field saturated hydraulic conductivity (kfs) is one of the most important soil properties that considerably contribute to soil quality. however, specifically in the structured soils, the measurement of kfs is difficult and time-consuming. therefore, verifying the simple and fast methods for kfs measurement is needed for effective soil monitoring. this study was conducted to investigate the effect of ring size (rings with diameters of 5.5, 10.88, 16, and 31.8 cm) on the kfs measured with simplified falling head (sfh) single ring method in a structured clay loam soil. furthermore, the effect of conventional tillage on kfs was assessed and the kfs measured with double ring (dr) method and sfh procedure was compared. results showed that while the ring size affected the measured kfs, the discrepancy between kfs results of given ring size compared to the smallest ring size (d = 5.5 cm) was practically negligible (factor of discrepancy ≤ 0.27). the effect of tillage operations on the measured kfs was substantial (discrepancy between kfs results of 2.1 to 3.1). the sfh and dr techniques yielded statistically different means of kfs. however, the discrepancy between the kfs values obtained with the sfh method using the largest ring size and the kfs values determined with dr method was practically negligible (factor of discrepancy < 0.37). the coefficient of variation of kfs values obtained with dr was also higher than the sfh measurements. in conclusion, the mean kfs values obtained with sfh technique were appropriate to monitor the effect of tillage.

Upgrade to premium to download articles

Already have an account?login

similar resources

Study of Saturated Hydraulic Conductivity Variations in Different Aggregate Size Distributions in an Agricultural Soil

Saturated hydraulic conductivity (Ks) is one of the most important soil physical characteristics that plays a major role in the soil hydrological behaviour. It is mainly affected by the soil structure characteristics. Aggregate size distribution is a measure of soil structure formation that can affect Ks. In this study, variations of Ks were investigated in various aggregate size distributions ...

full text

Characterization of field saturated hydraulic conductivity

Papers published in Hydrology and Earth System Sciences Discussions are under open-access review for the journal Hydrology and Earth System Sciences Abstract In the context of studies aiming at the estimation of effective parameters for unsaturated zone modelling, this work tackles the problem of experimental data quality, considering the large collection of data gathered at an experimental sit...

full text

Impact of Distillery Effluent and Salts on Hydraulic Conductivity of a Sandy Loam Soil

Irrigation with distillery effluent, besides influencing crop yield, may have considerable impact on physical properties of soil because of its high salt and organic carbon contents. This experimental study was conducted to evaluate the effect of distillery effluent on hydraulic conductivity of a sandy loam alluvial soil and compare the effect of inorganic salts of potassium (K) with that of di...

full text

Effect of tillage treatments on soil thermal conductivity for some Jordanian clay loam and loam soils

Soil thermal conductivity determines how a soil warms or cools with exchange of energy by conduction, convection, and radiation. The ability to monitor soil thermal conductivity is an important tool in managing the soil temperature regime to affect seed germination and crop growth. In this study, the temperature-by-time data was obtained using a single probe device to determine the soil thermal...

full text

Effect of pH on Saturated Hydraulic Conductivity and Soil Dispersion

The adverse effects of exchangeable sodium on soil hydraulic conductivity (K) are well known, but at present only sodicity and total electrolyte concentration are used in evaluating irrigation water suitability. In arid areas, high sodicity is often associated with high dissolved carbonate and thus high pH, but in humid areas high sodicity may be associated with low pH. To evaluate the effect o...

full text

Field Evidence of a Negative Correlation between Saturated Hydraulic Conductivity and Soil Carbon in a Sandy Soil

full text

My Resources

Save resource for easier access later

Save to my library Already added to my library

{@ msg_add @}

Journal title:

مدیریت خاک و تولید پایدار

جلد ۵، شماره ۳، صفحات ۱۶۱-۱۷۵

Keywords

[ ' f i e l d s a t u r a t e d h y d r a u l i c c o n d u c t i v i t y ( k f s ) i s o n e o f t h e m o s t i m p o r t a n t s o i l p r o p e r t i e s t h a t c o n s i d e r a b l y c o n t r i b u t e t o s o i l q u a l i t y . h o w e v e r ' , ' s p e c i f i c a l l y i n t h e s t r u c t u r e d s o i l s ' , ' t h e m e a s u r e m e n t o f k f s i s d i f f i c u l t a n d t i m e ' , ' c o n s u m i n g . t h e r e f o r e ' , ' v e r i f y i n g t h e s i m p l e a n d f a s t m e t h o d s f o r k f s m e a s u r e m e n t i s n e e d e d f o r e f f e c t i v e s o i l m o n i t o r i n g . t h i s s t u d y w a s c o n d u c t e d t o i n v e s t i g a t e t h e e f f e c t o f r i n g s i z e ( r i n g s w i t h d i a m e t e r s o f 5 . 5 ' , ' 1 0 . 8 8 ' , 1 6 , ' a n d 3 1 . 8 c m ) o n t h e k f s m e a s u r e d w i t h s i m p l i f i e d f a l l i n g h e a d ( s f h ) s i n g l e r i n g m e t h o d i n a s t r u c t u r e d c l a y l o a m s o i l . f u r t h e r m o r e ' , ' t h e e f f e c t o f c o n v e n t i o n a l t i l l a g e o n k f s w a s a s s e s s e d a n d t h e k f s m e a s u r e d w i t h d o u b l e r i n g ( d r ) m e t h o d a n d s f h p r o c e d u r e w a s c o m p a r e d . r e s u l t s s h o w e d t h a t w h i l e t h e r i n g s i z e a f f e c t e d t h e m e a s u r e d k f s ' , ' t h e d i s c r e p a n c y b e t w e e n k f s r e s u l t s o f g i v e n r i n g s i z e c o m p a r e d t o t h e s m a l l e s t r i n g s i z e ( d = 5 . 5 c m ) w a s p r a c t i c a l l y n e g l i g i b l e ( f a c t o r o f d i s c r e p a n c y ≤ 0 . 2 7 ) . t h e e f f e c t o f t i l l a g e o p e r a t i o n s o n t h e m e a s u r e d k f s w a s s u b s t a n t i a l ( d i s c r e p a n c y b e t w e e n k f s r e s u l t s o f 2 . 1 t o 3 . 1 ) . t h e s f h a n d d r t e c h n i q u e s y i e l d e d s t a t i s t i c a l l y d i f f e r e n t m e a n s o f k f s . h o w e v e r ' , ' t h e d i s c r e p a n c y b e t w e e n t h e k f s v a l u e s o b t a i n e d w i t h t h e s f h m e t h o d u s i n g t h e l a r g e s t r i n g s i z e a n d t h e k f s v a l u e s d e t e r m i n e d w i t h d r m e t h o d w a s p r a c t i c a l l y n e g l i g i b l e ( f a c t o r o f d i s c r e p a n c y < 0 . 3 7 ) . t h e c o e f f i c i e n t o f v a r i a t i o n o f k f s v a l u e s o b t a i n e d w i t h d r w a s a l s o h i g h e r t h a n t h e s f h m e a s u r e m e n t s . i n c o n c l u s i o n ' , ' t h e m e a n k f s v a l u e s o b t a i n e d w i t h s f h t e c h n i q u e w e r e a p p r o p r i a t e t o m o n i t o r t h e e f f e c t o f t i l l a g e . ' ]

Hosted on Doprax cloud platform doprax.com