Quality Assurance of Water-Level Records from Wells in the Chicot aquifer system in southwestern Louisiana Department of Natural Resources' Stategic Online Natural Resources Information System (SONRIS)

The Louisiana Department of Natural Resources’ (LaDNR) Strategic Online Natural Resources Information System (SONRIS) is a repository for recent (1930–present) well information that includes date of completion, well construction, geology, and water level. Well information is provided by the well drillers during the permitting process and is updated regularly by LaDNR. This data set consists of well records that were drilled into or through the Chicot aquifer and associated aquifer units (200-foot sand of Lake Charles area; 500-foot sand of Lake Charles area; 700-foot sand of Lake Charles area; Chicot aquifer system surficial confining unit; Chicot aquifer, lower sand unit; Chicot aquifer, shallow sand unit; Chicot aquifer, upper sand unit; upland terrace aquifer, upland terrace aquifer surficial confining unit) in an approximate 15 parish area in southwestern Louisiana as reported by the well drillers. Records that met specific threshold criteria were identified and statistical analysis were done to ensure that the well was open to the Chicot aquifer system (Asquith and others, 2020). Records that did not meet the specific criteria were identified and noted in the (196,142 - LaDNR SONRIS) dataset. Water levels from wells meeting all criteria were placed into a final dataset to be used in groundwater modeling efforts for the Chicot aquifer. Each original record can be found in the SONRIS data base by searching for the local well number.