tailieunhanh - WATER QUALITY MANAGEMENT AND CONTROL OF WATER POLUTION

Wet deposition of nitrate and ammonium can be measured at the same time as sulphate and pH using a standard precipitation collector used by ECN (Sykes and Lane, 1996) and the acid deposition monitoring networks and is cost effective on this basis. It also allows an assessment of the ratio of oxidised (nitrate) to reduced nitrogen (ammonium). Acid deposition has been declining in recent years – by more than 50% over large areas of the UK between 1985 and 1999 (NEGTAP, 2001) – and detecting the anticipated recovery of soils and plant communities is. | Water Reports 21 WATER QUALITY MANAGEMENT AND CONTROL OF WATER POLUTION Food and Agriculture I ara ji Organization OT IMFdr a HShrfSM United Nations ISSN 1020-1203 Water Reports 21 WATER QUALITY MANAGEMENT AND CONTROL OF WATER POLUTION Proceedings of a Regional Workshop Bangkok Thailand 26-30 October 1999 FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS Rome 2000 The designations employed and the presentation of material in this information product do not imply the expression of any opinion whatsoever on the part of the Food and Agriculture Organization of the United Nations concerning the legal status of any country territory city or area or of its authorities or concerning the delimitation of its frontiers or boundaries. ISBN 92-5-104503-8 All rights reserved. Reproduction and dissemination of material in this information product for educational or other non-commercial purposes are authorized without any prior written permission from the copyright holders provided the source is fully acknowledged. Reproduction of material in this information product for resale or other commercial purposes is prohibited without written permission of the copyright holders. Applications for such permission should be addressed to the Chief Publishing and Multimedia Service Information Division FAO Viale delle Terme di Caracalla 00100 Rome Italy or by e-mail to copyright@ FAO .

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