diff --git a/R/getDVData.r b/R/getDVData.r
index a35374be178a609e1812c6692bc1b52294d6e161..f627846b1f0caf258a95048776fdbe302629cf11 100644
--- a/R/getDVData.r
+++ b/R/getDVData.r
@@ -5,9 +5,9 @@
 #' A list of statistic codes can be found here: \url{http://nwis.waterdata.usgs.gov/nwis/help/?read_file=stat&format=table}
 #'
 #' @param siteNumber string USGS site number.  This is usually an 8 digit number
-#' @param ParameterCd string USGS parameter code.  This is usually an 5 digit number.
-#' @param StartDate string starting date for data retrieval in the form YYYY-MM-DD.
-#' @param EndDate string ending date for data retrieval in the form YYYY-MM-DD.
+#' @param parameterCd string USGS parameter code.  This is usually an 5 digit number.
+#' @param startDate string starting date for data retrieval in the form YYYY-MM-DD.
+#' @param endDate string ending date for data retrieval in the form YYYY-MM-DD.
 #' @param interactive logical Option for interactive mode.  If true, there is user interaction for error handling and data checks.
 #' @param convert logical Option to include a conversion from cfs to cms (35.314667). The default is TRUE, 
 #' which is appropriate for using NWIS data in the EGRET package.  Set this to FALSE to not include the conversion. If the parameter code is not 00060 (NWIS discharge),
@@ -24,13 +24,13 @@
 #' Daily <- getDVData('01594440','00060', '1985-01-01', '1985-03-31')
 #' DailyCFS <- getDVData('01594440','00060', '1985-01-01', '1985-03-31',convert=FALSE)
 #' DailySuspSediment <- getDVData('01594440','80154', '1985-01-01', '1985-03-31')
-getDVData <- function (siteNumber,ParameterCd,StartDate,EndDate,interactive=TRUE,convert=TRUE,format="tsv"){
-  data <- retrieveNWISdvData(siteNumber,ParameterCd,StartDate,EndDate,interactive=interactive,format=format)
+getDVData <- function (siteNumber,parameterCd,startDate,endDate,interactive=TRUE,convert=TRUE,format="tsv"){
+  data <- retrieveNWISdvData(siteNumber,parameterCd,startDate,endDate,interactive=interactive,format=format)
   
   #  need to setup conversion factor because the NWIS data are in cfs but we store in cms
   names(data) <- c('agency', 'site', 'dateTime', 'value', 'code')  # do a merge instead?
   
-  qConvert <- ifelse("00060" == ParameterCd, 35.314667, 1)
+  qConvert <- ifelse("00060" == parameterCd, 35.314667, 1)
   qConvert<- ifelse(convert,qConvert,1)
   
   localDaily <- populateDaily(data,qConvert,interactive=interactive)