Required skills: collect and analyse data apply mathematical modelling and analytical tools interpret and apply technical documentation to the collection, analysis and reporting of hydrometric data identify and address potential or actual operational problems record information and prepare reports and interpret a range of organisational documents use computer systems and use various computer programs&spreadsheets to create ratings use remote work communication systems check hydrometric data for correctness and accuracy in preparation for creating ratings identify characteristics of ratings appropriate to various cross section types&flow regimes identify incorrect and impossible ratings adjust gaugings, hydrograph trace and ratings to a common datum create ratings manually using various methods create ratings for standard measuring structures develop rating techniques to handle seasonal rating changes identify the possibilities and limitations of scale models for generating ratings identify and recognise causes of progressive, cyclical and sudden rating changes identify backwater-affected stations and use appropriate techniques to rate them identify gradual stream changes and adopt appropriate rating techniques identify short-term rating changes, their causes and means of correctly processing them apply Student's T test to determine whether a new rating is required draw an accurate rating by hand fit a rating curve using a number of mathematical techniques available in HYDSYS HYRATED identify the probable error of a rating, and understand its significance identify gross errors in ratings and the data used to compile them apply appropriate quality codes to a rating identify the elements of a stream bed&channel that affect ratings estimate channel roughness from photographs calculate the overall roughness coefficient of a channel consisting of a number of elements use graphical logarithmic methods to extend a rating identify appropriate sections to use for slope-area flow calculations manually calculate flow rates using a set of cross sections and a long section use a spreadsheet to perform calculations make correct measurements and calculate flow rates through and over various structures |