Suchergebnisse

Abstract. The warning water level is the default water level at which storm
surges may occur along a coast and indicates a stage of alert. This level
forms the basis for storm-surge forecasting, and prewarning is an important
reference for governments and aids in the decision-making process for
storm-surge prevention and disaster risk mitigation. The warning water level
has four categories (blue, yellow, orange, and red) based on water level
observational data. Taking into account the actual defense capability of the
shore, we determined the warning water level by comprehensively analyzing
factors, including the high water level at the typical return period of each
shore section, wave exposure degree and defense capability of storm-surge
protection facilities, and the shore-section importance level. Here, we
proposed a quantitative method for determining the warning water level, and
the application of this method was introduced by determining the warning water level at the shore section of Zhifu District (Yantai City,
Shandong Province, China) as an example. We analyzed the spatial
distribution characteristics of the warning water levels for 259 shore
sections along the coast and revealed their current marine disaster
prevention capabilities. Our findings provide a valid direction for
determining future warning water levels and a reliable scientific reference
for redetermining warning water levels in coastal areas while improving
marine disaster prevention and protection capabilities.