1 ▁is ▁software ▁that ▁was ▁developed ▁by ▁the ▁US ▁Army ▁Corps ▁of ▁Engine ers ▁to ▁estimate ▁river ▁flows ▁as ▁a ▁result ▁of ▁ra inf all . ▁ ▁It ▁was ▁written ▁in ▁the ▁FOR TRAN ▁language ▁and ▁until ▁ 1 9 8 4 ▁could ▁only ▁be ▁run ▁on ▁a ▁main frame ▁computer . ▁ ▁When ▁desktop ▁computers ▁became ▁popular ▁the ▁program ▁was ▁port ed ▁to ▁the ▁PC . ▁ ▁Engine ers ▁and ▁scient ists ▁still ▁use ▁it ▁today ▁because ▁of ▁its ▁ability ▁to ▁model ▁a ▁wide ▁range ▁of ▁natural ▁hydro logic ▁systems . ▁ ▁References ▁ ▁External ▁links ▁ ▁H EC - 1 ▁website ▁ ▁A ▁Study ▁of ▁H ydro logic ▁Sim ulation ▁Mod els ▁ ▁Army ▁H ydro logic ▁Engineering ▁Center ▁ ▁Category : Year ▁of ▁introduction ▁missing ▁Category : F ort ran ▁software ▁Category : H ydro log y ▁software <0x0A> </s> ▁The ▁ 2 0 1 6 – 1 7 ▁S ke leton ▁World ▁Cup ▁was ▁a ▁multi - race ▁series ▁over ▁a ▁season ▁for ▁ske leton . ▁The ▁season ▁started ▁on ▁ 2 ▁December ▁ 2 0 1 6 ▁in ▁Wh ist ler , ▁Canada ▁and ▁ended ▁on ▁ 1 7 ▁March ▁ 2 0 1 7 ▁in ▁P ye ong ch ang , ▁South ▁Korea . ▁The ▁World ▁Cup ▁was ▁organ ised ▁by ▁the ▁I BS F ▁( former ly ▁the ▁F IB T ) ▁who ▁also ▁run ▁World ▁Cu ps ▁and ▁Championships ▁in ▁ske leton . ▁The ▁season ▁was ▁spons ored ▁by ▁B MW . ▁ ▁Calendar ▁