Premium
Efficient simulation of a space‐time Neyman‐Scott rainfall model
Author(s) -
Leonard M.,
Metcalfe A. V.,
Lambert M. F.
Publication year - 2006
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/2006wr004986
Subject(s) - boundary (topology) , inefficiency , computer science , space (punctuation) , space time , cover (algebra) , mathematical optimization , mathematics , intensity (physics) , algorithm , simulation , mathematical analysis , physics , engineering , economics , mechanical engineering , quantum mechanics , microeconomics , operating system , chemical engineering
Existing space‐time Neyman‐Scott models characterize rainfall as the arrival of rain cells, clustered in time and independently distributed in space. Each cell is described as a cylinder having a random intensity (height) and random radial coverage. With this formulation it is possible to have cells with centers lying outside of a target simulation region yet having radii large enough to cover points within the region. To avoid significant boundary effects, it is necessary to include these points in the simulation. However, this can introduce inefficiency into the algorithm that is computationally restrictive. To overcome this, an efficient method is derived and demonstrated to improve computational performance.