Abstract
A survey program was carried out from June 1988 to august 1989 in North-eastern Italy in a pipe drainage area of 61 ha in order to verify if the year of installation (one part of the system has been installed in 1984 and another one year later) and the cover material of drains (pipes were covered with cocofibre for 2/5 of their length and without envelope for 3/5) could influence the functioning of the system. Collected data of drain discharge and water table depth were subjected to an elaborate statistical analysis.
A methodological approach to determine the sample size (how many measurements of discharge and watertable depth are required, in space and time, from a statistical stand-point) in drainage experiment is proposed. For drainage systems similar to the considered one, a sample size of 10–12 drains and 6–8 observation wells can be recommended in order to obtain a standard error lower than 10–15% of the mean.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Cavelaars J.C. 1988. Subsurface field drainage systems. Lecture notes no 21 for the 27th International Course on Land Drainage. ILRI, Wageningen, The Netherlands.
Dieleman P.J. & Trafford B.D. 1976. Drainage testing. F.A.O. Irrigation and Drainage Paper no 28. F.A.O., Rome.
Efron B. 1979. Bootstrap methods: another look at the jack knife.The Annals of Statistics 1979, Vol. 7, No. 1 (pp 1–26).
Favrot J.C. & Lesaffre B. 1988. Défaut de fonctionnement et réhabilitation de réseaux de drainage souterrain.Drainage 32: 15–22.
Giardini L. & Borin M. 1983. Stato attuale del drenaggio tubolare sotterraneo nel Veneto.L'Irrigazione XXX (2): 23–37.
Giardini L., Borin M., Ceccon P., Friso S. & Del Rizzo L. 1988. Controlli sperimentali sul drenaggio di ‘terreni difficili’.L'Informatore Agrario XLIV (40): 37–47.
Giardini L. & Giovanardi R. 1981. Ricerche sul drenaggio tubolare sotterraneo e sulla subirrigazione nel Veneto.L'Irrigazione XXVIII (4): 3–14.
Giardini L, Giovanardi R. & Borin M. 1983. Ricerche sul drenaggio tubolare sotterraneo e sulla sub-irrigazione nel Veneto (2° contributo).L'Irrigazione XXX (3–4): 11–26.
Merny G. & Dejardin J. 1970. Les némathodes phytoparasites des rizières de Côte d'Hivoire. II. Essai d'estimation de l'importance des populations. Cahier ORSTOM (sér. Biol.), 11, avril 1970: 45–67.
Oosterbaan R.J. 1988. Soil hydrological constants. Lecture notes no 15 for the 27th International Course on Land Drainage. ILRI, Wageningen, The Netherlands.
Oosterbaan R.J., Pissarra A. & Van Alphen J.G. 1988. Hydraulic head and discharge relations on tile drainage systems with entrance resistance. Paper presented at the 15th European Regional Conference of the ICID. Dubrovnik, Yugoslavia.
Snedecor G.W. & Cochran W.G. 1980.Statistical Methods. 7th edition. The Iowa State University Press, Ames, Iowa, USA.
Taylor R.L. 1961. Aggregation, variance and the mean.Nature 189: 732–735.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Borin, M., Berti, A. Testing and statistical analysis of the performance of a pipe drainage system: A case study in north-eastern Italy. Irrig Drainage Syst 5, 165–182 (1991). https://doi.org/10.1007/BF01140520
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01140520