Temporal--spatial evolution of the lagged effect of Karst drainage basin
for rainfall-runoff in Central Guizhou of China
Abstract
The occurrences of atmospheric precipitation and runoff do not coincide
with each other, but rather demonstrate a certain lag in time. Meanwhile
the lagged time and intensity are affected by the water storage
capacities, which is related to the occurrence of droughts. This paper
will develop the lagging index (LI) based on the measured data of 56
rainfall stations and 11 hydrological stations in the Central Guizhou of
China, and analyze the spatio-temporal evolution characteristics of
rainfall-runoff. The studies show that (1) the lagged effect of runoff
to rainfall in the Central Guizhou of China mainly shows the 3 lagged
periods with the lagged distribution areas accounting for more than 80%
of the total areas. (2) The order of spatio-temporal distribution
differences of the lagged intensities is the lagged period 2(Cv=0.62)