Drainage Water Quality
Water may be polluted by local or large-scale sources, in most cases chemical / organic, inorganic and radioactive /, usually related to tae intensive use of fertilizers, pesticides, herbicides, insecticides and fungicides which are non-degtadeable. Chémi
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Springer-Verlag Berlin Heidelberg GmbH
K.V.H. SMITH Civil Engineering Department The University of Southampton Southampton, U.K. D.W. RYCROFT Institute oflrrigation Studies The University of Southampton Southampton, U.K.
British Library Cataloguing in Publication Data
International Conference on Hydraulic Design in Water Resources Engineering (2nd; 1986: University of Southampton) Proceedings of the 2nd International Conference on Hydraulic Design in Water Resources Engineering: Land Drainage: University of Southampton, April1986. 1. Drainage I. Title II. Smith, K.V.H. III. Rycroft, David W. TS621 631.6'2
ISBN 978-3-662-22014-6 (eBook) ISBN 978-3-662-22016-0 DOI 10.1007/978-3-662-22014-6
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© Springer-Verlag Berlin Heidelberg 1986 Originally published by Springer-V crlag in 1986 Softcover reprint of the hardcover 1st edition 1986
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CONTENTS PREFACE KEYNOTE ADDRESS Land Drainage: Art; Skill, Science, or Technology? W. H. van der Molen Agricultural University, Wageningen, The Netherlands
SECTION 1. DESIGN OF FIELD DRAINAGE SYSTEMS The Modelling ofa Drainage System in the River Valley with Ground Water Under Pressure Waldemar Mioduszewski, Zbigniew Kowalewski Institute jor Land Reclamation and Grassland Farming, Poland
11
The Effect of Drainage Works within the Turu-Lung Somes-Barcau Zone Iulian Mihnea Institute oj Land Reclamation Studies and Design, Bucharest, Romania
21
Surface and Subsurface Drainage Projects Achieved in Stages Iulian Mihnea Institute oj Land Reclamation Studies and Design Bucharest, Romania
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New Drainage Formulas Considering Delayed Gravity Response and Evaporation from Shallow Water Table Weizhen Zhang Wuhan Institute of Hydraulic and Electrical Engineering, Wuhan, Hubei, China
35
Unsteady State Condition Drainage of Sloping Land Theoretical and Experimental Results Concerning the Raising of Water Table Depletion Curve I. Cojocaru and St. Popescu Polytechnic Institute oj Iait"-Romania
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Methods for Estimating the Evaporation from Shallow Water Table in Drainage Design Formulas Yujang Zhang Wuhan Institute oj Hydraulic and Electrical Engineering, Wuhan, Hubei, China
63
Tubewell-Spacing Formulas for Subsurface Drainage R.j. Oosterbaan International Institute jor Land Reclamation and Improvement, Wageningen, The Netherlands
75
SECTION 2. MAIN DRAINAGE AND FLOOD CONTROL Area Reduction Factors for Land Drainage Design in
