Control effects of foothill incubation environments on the distribution pattern of pipeline water damage hazard

Abstract

The distribution of pipeline water damage hazards and the control effect of the disaster-inducing environment are the theoretical basis of risk assessment and prevention decision-making. Based on the observation data of pipeline water damage hazard at the northern foot of Yumu mountain from 2015 to 2021, indexes of the point density and linear density were introduced to analyze the spatial and temporal distribution law of water damage hazard, and the control effect of disaster inducing environment factors was discussed, such as rainfall, slope, pluvial fan superimposition, and scarp. The results show that: in terms of time, the point density and linear density of water damage hazard show a downward trend along with the pipeline operation, and the decrease of density of river channel is higher than that of slope water damage hazard, but the local steep rise phenomenon is significant. In terms of space, the point density of water damage hazard is affected by both the slope water damage hazard and the river channel water damage hazard, the influence width of the former is greater than that of the latter, so the linear density of water damage hazard is controlled by the slope water damage hazard. The frequency and intensity of heavy rain have a significant impact on the density of water damage hazards, especially on the slope water damage hazard. The longitudinal slope of Piedmont is positively correlated with the linear density of water damage hazard. Water damage hazard is developed in the superimposition range of pluvial fan, and its impact on linear density is more significant than that on point density. Its impact on slope water damage hazard is more significant than that on river channel water damage hazard. The point density of the water damage hazard is negatively correlated with the distance between the pipeline and the scarp, and the linear density of the water damage hazard is positively correlated with the distance between the pipeline and the scarp. The crossing and accompanying of the pipeline and the scarp is the main control factor for the alternate development of the slope water damage hazard and the river channel water damage hazard.