机读格式显示(MARC)

• 000 01228cam a2200289 a 4500

• 001 0000398458

• 005 20121217112000.0

• 008 110728s2011 enka b 001 0 eng

• 010 __ |a 2011414671

• 020 __ |a 9781845938741 (pbk.) : |c CNY542.00

• 020 __ |a 9781845932633 (hb.)

• 040 __ |a DLC |c DLC |d DLC

• 042 __ |a pcc

• 050 00 |a TC812 |b .L38 2011

• 082 00 |a 627/.52 |2 23

• 090 __ |a S274.2/LA/ED-11

• 093 __ |a S274.2 |2 4

• 100 1_ |a Laycock, Adrian.

• 245 10 |a Irrigation systems : |b design, planning, and construction / |c Adrian Laycock.

• 250 __ |a 1st pbk. ed.

• 260 __ |a Wallingford, Oxfordshire, OX ; |a Cambridge, MA : |b CABI, |c 2011.

• 300 __ |a 285 p. : |b ill. ; |c 30 cm.

• 504 __ |a Includes bibliographical references and index.

• 505 0_ |a Evolution and a prelude to change -- Elements of irrigation -- Water management -- Canal operation & automation -- Irrigation water demands -- Canal architecture -- Canal control structures -- Low-pressure pipelines -- Canal lining -- Canal hydraulic design -- Troubleshooting: feedback from the field -- Costs and economics.

• 650 _0 |a Irrigation projects |x Planning.

• 650 _0 |a Irrigation projects |x Design and construction.

• 920 __ |a 211180 |z 2