createReachinstantiates an object from class of createReach
# S3 method for base
createReach(name,routingMethod,inflow,
routingParams,
delayInflow,label,downstream)a string: the name of reach to be instantiated
a string: the method of channel routing. available types: "muskingum", and "muskingumcunge"
a vector (optional): a time series of direct inflow rather than flows comming from upstream (cms)
a list : parameters associated to the routingMethod: k and x for "muskingum", bedWith (m),
sideSlope (m/m), channelSlope (m/m), manningRoughness, riverLength (Km) for "muskingumcunge"
an integer (optional): presenting the time steps to delay direct inflow time series
an integer: a unique number, as label
an integer: the code of downstream object
a list: an object from class of list instantiated by createReach