tailieunhanh - Water quality in New Zealand: Understanding the science

A further example of process redesign for manufacturability is Boeing’s Point of Use system for chemical materials. This enables the storage of materials where the production process utilizes them, as opposed to the previous system which utilized centralized chemical disbursement centers that entailed frequent machinist travel over substantial distances and greater overall chemical usage and waste. Generally, point of use efforts enable the storage of materials where the production process utilizes them. Boeing controls the amount of chemical inventory and waste on the floor by using minimum/maximum quantities, right sizing containers, (holding only the necessary amount of material required. | Water quality in New Zealand Understanding the science March 2012 Parliamentary Commissioner for the Environment Te Kaitiaki Taiao a Te Whare Paremata 2 Acknowledgements The Parliamentary Commissioner for the Environment would like to express her gratitude to those who assisted with the research and preparation of this report with special thanks to her staff who worked so tirelessly to bring it to completion. Photography Cover Erin Currie This document may be copied provided that the source is acknowledged. This report and other publications by the Parliamentary Commissioner for the Environment are available at Contents Commissioner s overview 5 1 Introduction 9 3 Purpose of the report 10 Structure of the report 10 What the report does not cover 11 2 The story of water quality in New Zealand 13 Settlement of New Zealand 13 Town sewage causes disease and death 14 Deforestation leads to erosion and flooding 15 Factories towns and farms raise nutrient levels 18 Recent developments 20 3 Pathogens 21 How pathogens get into water 22 What pathogens do in water 23 Measuring pathogens in water 24 4 Sediment 25 How sediment gets into water 26 What too much sediment does in water 27 Measuring sediment in water 29 5 Nutrients 31 How nutrients get into water 31 What too many nutrients do in water 32 Measuring nutrients in water .