APPENDIX C 



HYDROLOGIC AND CLIMATOLOGIC MAPS, GRAPHS AND TABLES 



PREPARED FOR THE LONG ISLAND SOUND REGIONAL STUDY 



Copies are on file at the offices of the New England River Basins Commission 



1. Flood Prone Area Maps for the following quadrangles in Subregions I. 



2, 3, *♦ and 5. Scale I 2*1,000. 



Ansonia Haddam New Haven Scotland 



Clinton Jewetl City Naugatuck Southbury 



Colchester Long Hill Norwalk North Wallingford 



Deep River Meriden Norwich We^tporl 



Essex Middle Haddam old Lyme Uillimantic 



Gui Iford Hoodus Plainf ield 



II. Hydrologic maps for Subregions 6, 7, 8 and 9; all maps at 1 125,000 

 or I :25O,000 scale. 



Lines of equal thickness - Hagothy aquifer 



Contours of the upper glacial aquifer 



Contours on the surface of the Magothy aquifer 



Contours on the surface of the Raritan clay 



Contours on the surface of the Lroyd aquifer 



Contours on the surface of the bedrock 



Elevation of water tables, March 1971 



Piezometric surface of Lloyd aquifer, January 1972 



selected geohydrolog ic sections 



Piezometric surface at the base of the Magothy aquifer, March, 1972 



a. Cross section of Long Island: Approximate time for ground water to 

 travel along section c-c from water table 



b. The relation of heads of major aquifers 

 Isopach of Raritan day of the Raritan Formation 

 Isopach of Lloyd aquifer 



Water quality of the Magothy aquifer 

 Isopach of saturated upper glacial aquifer 

 Hean-annual flow of all gaged streams 

 Mean-monthly flow of continuously gaged streams 

 Water quality of the Lloyd aquifer 

 Water quality of the upper glacial aquifer 



Estimated average hydraulic conductivity of Magothy aquifer 

 Estimated average hydraulic conductivity of upper glacial aquifer 

 Patterns of ground-water development 



Estimated average hydraulic conductivity of Lloyd aquifer 

 Transmissibi I i ty of Lloyd aquifer 

 Locations of stream gaging stations 



Net change of ground-water levels as a result of the 1962-66 drought 

 Location of recharge basins in Naussau and Suffolk Counties, Long Island, 



III. Hydrologic tables and maps for Subregions 1, 2, 3, k and S. 



Ground-water availability; I 62,500 scale. 



Drainage areas; 1 2*1,000 scale. 



Average yearly runoff, 1 62,500 scale. 



Monthly average runoff, peak runoff (return periods of) 100, 50, 25, 2 



years, 7 day-10 year runoff; 1-62,500 scale. 

 Time of travel - Quinnipiac River (table) 

 Time of travel - Connecticut River (table) 

 Distribution of dissolved solids in ground water and streams at low flow; 



1 125.000 scale. 

 Distribution of iron and manganese in ground water and streams at low 



flow; 1 125,000 scale. 

 Distribution of hardness of ground water and streams at low flow; 



I 125,000 scale. 



IV. Three maps shewing locations of tidal bench marks for New York and 

 Connecticut. 



V. Three lists of differences between Sea-Level Datum of 1929 (SLD) and 

 mean low water (MLW) for each location where tidal bench marks and geodetic 

 bench marks of the precise level net have been connected by spirit levels. 



VI. Thirty-one tidal bench mark sheets giving descriptions to aid in 

 recovery of the marks and tide information. Mean high water (MHW) and 

 mean tide level (MIL) are given as related to MLW. Mean range can be 

 obtained as the difference between MHW and MLW. 



VII. Tide Tables, East Coast of North and South America showing time and 

 differences in relation to reference stations as well as ranges. Nos. 

 1187-1263 and 133l-l'*07 are applicable to Long Island Sound. 



A. Tidal current charts for: 



Long Island Sound and Block Island Sound 



Slock Island Sound and Eastern Long Island Sound 



Western Long Island Sound (will be available in January 197**) 



B. Tidal current diagrams for 1973 to accompany the above charts 

 IX. Volume of water in Long Island Sound 



X. Bathymetric data 



A. Bathymetric contour maps of Long Island Sound (C t CS 0808n-5l, 

 53, and 55) 



S. Fourteen hydrographic survey sheets of surveys conducted within 



Long Island Sound since the compilation of the Bathymetric maps 



H-89i»9 (1967) H-8997 (1968I H-9O88 (1969) ■ 



H-8951 (1967) H-9008 (1968) H-9089 (1969) '' 



H-8952 (1967) H-9093 (1968) H-908I (1970) ' 



H-8967 (1967) H-9030 (1968) H-9012 (1971) 



H-8996 (1968) H-9O87 (1969) 



These sheets are in the process of being verified. 



C. Nautical-charts 



C 6 CS 1212 Long Island Sound eastern part 



C 6 CS 1211 Block Island Sound 



C & GS 1213 Long Island Sound western part 



Fresh water inflcM into Long Island Sound 



Map of New York State sewage treatment facilities discharging to 

 ing Island Sound 



A. Reference to bedrock, surficial deposits and ground-water resources 



of New York State in the Long Island Sound Study area. 



B. List of Geological publications of the New York Stale museum 



C. Resume of investigations of the marine geology of the environs of 



Long Island, New York 



Listing of the available historical precipitation data. 

 Bedrock contour maps of major river estuaries, 1 21*, 000 scale, 



A. Bedrock contour map of the New London quadrangle 



B- Bedrock contour map of the New Haven quadrangle 



C. Bedrock contour map of the Mi Iford quadrangle 



D. Bedrock contour map of the Old Lyme quadrangle 



CI Imatological maps and graphs 



Mean annual temperature 

 Mean annual temperature range 



Annual march of the standard deviation of mean temperatures for 5 

 stations 



Long-term variations in precipitation at New London, Conn., water 



years 1887-1967 

 Long-term variations in precipitation at New Haven, Conn., water 



years 1887-1967 

 Mean annual snowfall 



Average length of the freeze free season (in days) 

 Observed frequency of tropical storm and hurricane occurrence in and 



near the Long Island Sound Study area 

 Maximum annual number of thunderstorms 

 Mean monthly radiation at Central Park, N.Y., Sayville, L,l, and 



Newport, R.I. 

 Annual march of mean cloudiness in tenths for 2 stations on Long Island 

 Wind roses for each of four seasons at 5 stations 



CI imatological tables 



Monthly and annual mean max imum temperature 



Monthly and annual mean minimum temperature 



Monthly and annual mean temperature 



Monthly and annual extreme maximum temperature statistics 



Monthly and annual extreme minimum temperature statistics 



Monthly and annual mean, greatest and least number of days with maxi- 

 mum fmperature less than or equal to 32", *t5°, 80", 90°F 



Monthly and annual mean, greatest and least numbers of d.-iys with mini- 

 mum temperatures less than or equal to hS" , 36°, 32°, 2W , 16", 0"F 



Air conditioning design data 



Air conditioning critera data 



Heating design data 



Mean monthly and seasonal heating degree-days (base 65"F) 



Mean monthly and seasonal cooling degree-days (base 65"F) 



Probability dates of last spring and first fall occurrence of 32°, 

 2k , and 16' F 



Mean monthly and seasonal growing degree-days (base 50"F) 



Mean monthly and seasonal growing degree-days (base '40°F) 



Monthly and annual greatest, least and mean number of days with tem- 

 perature moving through the 32"F threshhold ( f reeze-thaw) 



Expected recurrence intervals of maximum point rainfall amounts 



Extreme 2*4-hour precipitation statistics 



Extreme 2U-hour snowfall statistics 



Greatest monthly and annual precipitation for entire period of record 



Least monthly and annual precipitation for entire period of record 



Mean, greatest and least monthly and annual number of days with pre- 

 cipitation equal to or greater than ,01, .10, .50 and 1.00 inches 



Mean and greatest monthly and seasonal snowfall 



Mean and greatest monthly and annual number of days with snowfall equal to 

 or greater than 1, 2, 1* and 8 inches 



Snow cover statistics and probabilities 



Probability that an existing tropical cyclone centered at a specified 

 latitude and longitude in the month shown will be within the Long 

 Island Sound Study area after 72, I48 and 2U hours 



Chronology of Long Island Sound Study area tornadoes 



Humidity statistics for I* stations for January, April, July and October 



Frequency of occurrence of sky cover 

 Distribution of runs of dry days 



C-1 



