Kentucky Peak Flows

Vector data set consisting of lines representing streams in Kentucky. Each line segment is attributed with the number of square miles of drainage area, and the peak flow values for 2, 5, 10, 25, 50, 100, 200, and 500 year intervals at that point on the stream. Peak flow values were calculated using the equations in the USGS Water-Resources Investigations Report 03-4180 "Estimating the Magnitude of Peak Flows for Streams in Kentucky for Selected Recurrence Intervals." The data also has attributes indicating when the peak flow values should not be used because the drainage area is out of the size range for the equation, the drainage area is greater than 10 percent impervious, or the stream segment is in a lake or pond.本矢量数据集由代表肯塔基州境内溪流的线状要素组成。各线段均附带两项属性：一是汇水面积（drainage area，单位：平方英里），二是该溪流点位处对应2、5、10、25、50、100、200、500年重现期（recurrence interval）的洪峰流量（peak flow）值。上述洪峰流量值依据美国地质调查局（USGS）发布的《水资源调查报告03-4180：针对选定重现期估算肯塔基州溪流洪峰量级》中的公式计算得到。该数据集还包含属性字段，用于标注洪峰流量值不适用的情形：汇水面积超出公式适用范围、汇水区域不透水地表占比超过10%，或该河段位于湖泊或池塘内。