Data/hora: 03/06/2024 02:08:16

Biblioteca(s): 	Embrapa Meio Norte / UEP-Parnaíba.	
Data corrente: 	15/03/1995	
Data da última atualização: 	15/03/1995	
Autoria: 	BUCKLAND, G. D.; HARKER, D. B.; SOMMERFELDT, T. G.	
Afiliação: 	Drainage Branch, Alberta Agriculture, Agriculture Centre; Research Station, Agriculture Canada.	
Título: 	Comparison of methods for determining saturated hydraulic conductivityand drainable porosity of two southern Alberta soils.	
Ano de publicação: 	1986	
Fonte/Imprenta: 	Canadian Journal Soil Science, v.66, p.249-259, may 1986.	
Idioma: 	Inglês	
Notas: 	Separata.	
Conteúdo: 	Saturated hydraulic conductivity (Ks) and drainable porosity (f) determined by different methods and for different depths were compared withthose determined from the performance of drainage systems installed attwo locations. These comparisons were made to determine which methods are suitable for use in subsurface drainage design. Auger hole and constant-head well permeameter Ks were 140 and 110%, respectively, of Ks determined from subsurface drains. Agreement of horizontal or verticalKs, from in situ falling-head permeameters, to other methods was satisfactory providing sample numbers were large. Ks by Tempe cells was only 3-10% of drain Ks and in one instance was significantly lower than Ks determined by all other methods. At one site a profile-averaged value of f determined from the soil moisture characteristic curve (0-5kPa) of semidisturbed cores agreed with that determined from drainage trials. At the other site, a satisfactory value of f was found only when the zone in which the water table fluctuated was considered. Results indicate that Ks determined by the auger hole and constant-head wellpermeameter methods, and f determined from the soil moisture characteristic curve of semidisturbed cores, are sufficiently reliable and practical for subsurface  drainage design.	
Thesagro: 	Condutividade Hidráulica; Drenagem; Porosidade; Solo.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Meio Norte / UEP-Parnaíba (CPAMN-UEPP)	
Exemplares: 	CPAMN-UEPP - (3778-1) - EMB - SP - -- -  -  - 1988.00036 - DIS