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Title: River quality survey GQA assessment 1998 : Dales area freshwater rivers and canals river reach classification summary 1990-9
Author: Environment Agency North East Region Dales Area
Document Type: Monograph
This document contains the derived General Quality Assessment (GQA) of the rivers in Dales Area for the year 1998. The grade is based on an amalgamation of three years data and thus reflects the river chemistry over the period 1996-8. The parameters used in the classification are Biochemical Oxygen Demand (BOD), Dissolved Oxygen (DO) and Ammonia and a monitoring frequency of at least monthly is preferred. The GQA results have been calculated by the National Centre for Environmental Data and Surveillance at Twerton. There have been some discrepancies between their database of sites and ours, always a problem when such huge blocks of information are transmitted backwards and forwards. This resulted in no GQA grade being calculated for some sites. Where this has occurred I have filled in the missing grade by calculating it locally. In such circumstances this is identified by the grade being represented in lower case.
Publisher: Environment Agency
Publication Date: 1999
Publication Place: Newcastle-Upon-Tyne
Subject Keywords: Water quality surveys
Geographic Keywords: EA Yorkshire and North EastYorkshireTees (North England)Swale, Ure, Nidd and Upper Ouse catchmentTees catchmentEsk and Coast catchmentDerwent (NW) catchment
Extent: n.p. [40]
Total file downloads: 265

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