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What is TR55COM.DAT ? #14

Open LECOMTE-ISADEV opened 5 years ago

LECOMTE-ISADEV commented 5 years ago

What is this file used for ?

shawking commented 5 years ago

[From User's Manual APEX1501 Sept 2018] Contains "Data for TR55 runoff estimation" Also (near bottom): "Peak Rate Estimate Code Types I and IA represent the Pacific maritime climate with wet winters and dry summers. Type III represents Gulf of Mexico and Atlantic coastal areas where tropical storms bring large 24-hour rainfall amounts. Type II represents the rest of the country. For more precise distribution boundaries in a state having more than one type, contact the SCS State Conservation Engineer (SCS 1986). (Range: -1 to 4) 0-1>0Modified Rational EQ Stochastic Peak Rate Estimate Modified Rational EQ Rigid Peak Rate Estimate SCS TR55 Peak Rate estimate 1 → Type 1 rainfall pattern 2 → Type 1A rainfall pattern 3 → Type 2 rainfall pattern 4 → Type 3 rainfall pattern"

[This link explains TR55 more: https://www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb1044171.pdf] "Technical Release 55 (TR-55) presents simplified procedures to calculate storm runoff volume, peak rate of discharge, hydrographs, and storage volumes required for floodwater reservoirs."