Estimating the change in the rational runoff coefficient through history in Jefferson County, Texas

Abstract Jefferson County in Texas has experienced devastating storms recent years resulting billions of dollars damages. The county gone through temporal milestones terms population growth and industrial development. Many studies have shown that urban development increases the risk flooding by decreasing soil infiltration capacity. current study focuses on estimating extent to which led increased imperviousness using a combination historical spatial data. Rational runoff coefficients were estimated compared at three different times over span 120 years. A land survey map for 1898, an aerial imagery 1966 parcel 2019 obtained from various sources. maps available, each format, analyzed determine use cover type respective coefficient 21% 1898 remained same till 2019. estimates are correlation with patterns county. These preliminary analyses useful contributions major overall development, or if they may be more impacted other factors such as changes weather patterns.