The invention discloses a riverway flood inundation
simulation method based on
water level monitoring data. According to the method based on the scattered
water level monitoring data collected along a riverway, firstly, piecewise linear interpolation is carried out on a center line of the riverway, and
water level values of all places along the center line of the riverway are obtained; secondly, on a riverway DEM, the
flood water level of each DEM box is worked out according to the nearest neighbor interpolation; lastly, the actual inundation range and the actual inundation
water depth distribution of riverway flood are calculated according to the seed
region growing method in the riverway. According to the riverway flood inundation
simulation method, the natural form change of riverway winding up and down is fully taken into consideration, interpolation is carried out on the value of the riverway water level between water level monitoring stations according to distance parameters, and the interpolation water level
distortion problem can be effectively avoided. Meanwhile, the riverway flood inundation
simulation method can effectively solve the problem that due to the fact that the number of the
flood water level monitoring stations distributed on the riverway is too small, and water level
monitoring data sample points are insufficient, a conventional
flood water level space interpolation method based on overall areas is hard to apply.