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Environment Agency information Centre 1—I ^ ffi /'A ENVIRONMENT AGENCY 127035 HYDROMETRIC REPORT & CATALOGUE 1996 Environment Agency Midlands Region Regional Scientific Department July 1997 Sapphire East 550 Streetsbrook Road Solihull Telephone: 0121-711-2324 B91 1QT Fax: 0121-711-5824 Hydrometric Report 1996 Midlands Region FOREWORD The 1996 Hydrometric Report and Catalogue is one o f a series o f annual hydrometric reports produced by the staff of the Environment Agency Midlands Region. It contains a short hydrometric review o f the year 1996 with a range o f data summaries at key sites. The hydrometric catalogue section contains listings of the river level andflow stations, groundwater boreholes, rainfall gauges and climate stations maintained by the region. Cover photograph : River Tern at Walcot. (Photo : Andrew Mozley). Environment Agency ii Hydrometric Report 1996 Midlands Region TABLE OF CONTENTS Page No. List of Tables iv List of Figures v HYDROMETRIC SUMMARY AND DATA FOR 1996 1. INTRODUCTION 1 2. HYDROMETRIC REVIEW 2 2.1 Monthly Hydrological Summary 2.2 The droughts of 1995 and 1996 & Low Flow Surveys 2.3 Hydrometric Facts 1996 3. CURRENT METER GAUGINGS 25 3.1 Current Meter Gaugings for 1996 4. RIVER FLOW DATA 44 4.1 Monthly Mean Flows for Selected Sites 4.2 Annual Hydrographs and Flow Duration Curves 5. RAINFALL 64 5.1 Daily Rainfall Totals for Selected Sites 5.2 Areal Average Rainfall for 1996 6. GROUNDWATER 78 6.1 Groundwater Hydrographs 7. MISCELLANEOUS DATA 86 7.1 Soil Moisture and Evapotranspiration 7.2 Water Temperature SITE CATALOGUES A. RIVER LEVEL AND FLOW STATIONS Catalogue 2 B. AVAILABILITY OF NATURALISED FLOW RECORDS Catalogue 10 C. RAINFALL INTENSITY GAUGES Catalogue 11 D. RAINFALL STORAGE GAUGES Catalogue 14 E. CLIMATE STATIONS Catalogue 23 F. GROUNDWATER OBSERVATION BOREHOLES Catalogue 24 G. SHROPSHIRE GROUNDWATER SCHEME Catalogue 32 H. HYDROMETRIC STAFF Catalogue 38 I. OBTAINING INFORMATION FROM THE AGENCY Catalogue 39 Environment Agency iii Hydrometric Report 1996 Midlands Region LIST OF TABLES TABLE DESCRIPTION Page No. TABLE 1 LOW FLOW SURVEYS - UPPER SEVERN...................................................7 TABLE 2 LOW FLOW SURVEYS - AVON..................................................................... 11 TABLE 3 LOW FLOW SURVEYS - LOWER SEVERN.................................................. 13 TABLE 4 LOW FLOW SURVEYS - UPPER TRENT...................................................... 14 TABLE 5 LOW FLOW SURVEYS - DOVE & CHURNET............................................. 17 TABLE 6 LOW FLOW SURVEYS - DERWENT............................................................ 18 TABLE 7 LOW FLOW SURVEYS - SOAR......................................................................19 TABLE 8 LOW FLOW SURVEYS - LOWER TRENT....................................................20 TABLE 9 LOW FLOW SURVEYS - IDLE AND TORNE...............................................22 TABLE 10 HYDROMETRIC FACTS 1996......................................................................... 24 TABLE 11 CURRENT METER GAUGINGS FOR 1996.................................................... 26 TABLE 12 MONTHLY MEAN FLOWS FOR SELECTED SITES....................................46 TABLE 13 DAILY RAINFALL TOTALS AT LLANGEDWYN....................................... 65 TABLE 14 DAILY RAINFALL TOTALS AT HATTON GRANGE.................................66 TABLE 15 DAILY RAINFALL TOTALS AT BRAMPTON BRYAN..............................67 TABLE 16 DAILY RAINFALL TOTALS AT FINHAM....................................................68 TABLE 17 DAILY RAINFALL TOTALS AT PERSHORE COLLEGE........................... 69 TABLE 18 DAILY RAINFALL TOTALS AT WILLENHALL......................................... 70 TABLE 19 DAILY RAINFALL TOTALS AT WOOD COTTAGE................................... 71 TABLE 20 DAILY RAINFALL TOTALS AT SPONDON.................................................72 TABLE 21 DAILY RAINFALL TOTALS AT ULVERSCROFT....................................... 73 TABLE 22 DAILY RAINFALL TOTALS AT KEADBY...................................................74 TABLE 23 AREAL RAINFALL FOR 1996......................................................................... 77 TABLE 24 LEVEL AND FLOW MEASUREMENT STATIONS......................................Catalogue 2 TABLE 25 AVAILABILITY OF NATURALISED FLOW RECORDS...................... Catalogue 10 TABLE 26 RAINFALL INTENSITY GAUGES................................................................. Catalogue 11 TABLE 27 RAINFALL STORAGE GAUGES................................................................... Catalogue 14 TABLE 28 CLIMATE STATIONS...................................................................................... Catalogue 23 TABLE 29 GROUNDWATER OBSERVATION BOREHOLES.......................................Catalogue 24 TABLE 30 SHROPSHIRE GROUNDWATER SCHEME...................................................Catalogue 32 Environment Agency iv Hydrometric Report 1996 Midlands Region LIST OF FIGURES FIGURE DESCRIPTION Page No. FIGURE 1 MONTHLY AREAL RAINFALL AS % LTA (1961 -1990)............... 5 FIGURE 2 CURRENT METER CABLEWAY...................................................... 25 FIGURE 3 FLOW PERFORMANCE AT SAXONS LODE.................................... 44 FIGURE 4 LOCATION MAP FOR EXAMPLE SURFACE WATER & RAINFALL SITES ......................... 48 FIGURE 5 ANNUAL HYDROGRAPH AND FLOW DURATION CURVE FOR. .YEATON....................... 49 FIGURE 6 . RODINGTON............... 50 FIGURE 7 . HOOKAGATE............. 51 FIGURE 8 .BEWDLEY.................... 52 FIGURE 9 . STARETON................. 51 FIGURE 10 . EVESHAM.................... 54 FIGURE 11 . STOKE........................... 55 FIGURE 12 . CALTHORPE PARK.... 56 FIGURE 13 . LEA MARSTON.......... 57 FIGURE 14 . IZAAK WALTON........ 58 FIGURE 15 . MARSTON-ON-DOVE .59 FIGURE 16 . MATLOCK................... 60 FIGURE 17 . DERBY.......................... 61 FIGURE 18 . LITTLETHORPE......... 62 FIGURE 19 . COLWICK.................... 61 FIGURE 20 MAP OF 1996 MIDLANDS REGION ANNUAL RAINFALL............ .75 FIGURE 21 MAP OF 1996 RAINFALL AS PERCENTAGE OF LONG TERM AVERAGE (1961-90)......... 76 FIGURE 22 LOCATION MAP FOR GROUNDWATER EXAMPLE SITES.......... 79 FIGURE 23 GROUNDWATER HYDROGRAPH FOR .. SWINNOW WOOD...... 80 FIGURE 24 ......................................................................MORRIS DANCERS...... 80 FIGURE 25 ......................................................................HAZEL HILL.................. 81 FIGURE 26 ......................................................................SUNNYBANK FARM.... .81 FIGURE 27 ......................................................................WEEFORD FLATS........ 82 FIGURE 28 ............................ .........................................HODHILL FARM........... 82 FIGURE 29 ......................................................................RIDER POINT................ 83 FIGURE 30 ...................................................................... HEATHLANES............. 81 FIGURE 31 ......................................................................CHECK HILL................. 84 FIGURE 32 ......................................................................BURCOTT LANE........... 84 FIGURE 33 ......................................................................SHRAWLEY................... 85 FIGURE 34 ......................................................................ANTHONY’S CROSS.... 85 FIGURE 35 SOIL MOISTURE DEFICIT VALUES - SEVERN CATCHMENT 1996....................................... 87 FIGURE 36 SOIL MOISTURE DEFICIT VALUES - TRENT CATCHMENT 1996 87 FIGURE 37 ACTUAL AND POTENTIAL EVAPOTRANSPIRATION VALUES - SEVERN C'MENT 1996.,88 FIGURE 38 ACTUAL AND POTENTIAL EVAPOTRANSPIRATION VALUES- TRENT C'MENT 1996 ... 88 FIGURE 39 ANNUAL PLOT OF MEAN DAILY WATER TEMPERATURE FOR MEIFOD 1996 ............... 89 FIGURE 40 ANNUAL PLOT OF MEAN DAILY WATER TEMPERATURE FOR BEWDLEY 1996 ........... 89 FIGURE 41 LOCATION OF LEVEL AND FLOW STATIONS - SEVERN.......................................Catalogue 5 FIGURE 42 LOCATION OF LEVEL AND FLOW STATIONS - TRENT.........................................Catalogue 9 FIGURE 43 LOCATION OF RAINFALL INTENSITY GAUGES.......................................................Catalogue 13 FIGURE 44 LOCATION OF RAINFALL STORAGE GAUGES.........................................................Catalogue 22 FIGURE 45 FLOW RATE CONVERSION DIAGRAM....................................................................... Catalogue 40 Environment Agency v Hydrometric Report 1996 Midlands Region INTRODUCTION The 1996 Hydrometric Report and Catalogue is the second published since the Environment Agency assumed responsibility for hydrometric data in the Midlands Region. The report is designed to act as a reference for the year and to give an indication of the the type and availability of data that can be obtained from established measurement stations. The catalogue section provides comprehensive lists of these stations with maps to identify their locations. The production of areport that provides a snapshot of the current state of the environment is becoming increasingly important as awareness of the impact of climatic change increases. The hydrometric data quoted in the report represents the combined efforts, of the hydrometric field staff, who maintain the stations and undertake vital calibrations, and the staff within the Hydrometric Data team who process and archive the data for future use. The Hydrometric Data Team maintains large computerized