Water and the environment : innovation issues in irrigation and drainage / ed. by Luis S. Pereira and John W. Gowing ; Portuguese National Committee of the International Commission on Irrigation & Drainage ; selected papers of the 1st Inter-Regional Conference "Environment-Water: Innovative Issues in Irrigation and Drainage", held in Lisbon, Portugal, September 1998. Inter-Regional Conference "Environment-Water" (1st : 1998 : Lisbon, Portugal) Pereira, L. S. Gowing, John W. International Commission on Irrigation and Drainage. Portuguese National Committee. Irrigation engineering Congresses. Irrigation Environmental aspects Congresses. Drainage Congresses. Water quality management Congresses. TC803 .I54 1998 627.52 WAT Includes bibliographical references and index. New York : E&FN Spon, 1998. 1998. 1998 Text ix, 470 p. : http://www.loc.gov/catdir/enhancements/fy0651/98026951-d.html eng