Fig. 7

Comparison of scaling of X and Y propagation with time for the isoviscous horizontal and sloping benchmarks without obstacles (BM-A and C). For horizontal unconfined flow, theory predicts X = Y ~ t^1/2 (Huppert, 1982), while for sloping flow, theory predicts X ~ t^7/9 and Y ~ t^1/3 (Lister, 1992). The best-fit exponents determined by linear regression in log-log space are plotted