Agenda - 06-19-2012-13 (3) - Laserfiche WebLink

Browse Search

Similarly, the well located at the Eno Confluence Property is located in proximity to both the West and the East Forks of the Eno River. The hydrograph for this well, included above, ap- pears to reflect a considerable amount of"flashiness" (rapid fluctuations, either up or down, in a short period of time) in the groundwater level. This is likely to be a result of fairly rapid increas- es and decreases in the flow of the Eno River as a result of precipitation in the upper Eno River watershed, indicating that the groundwater level in this area is fairly rapidly influenced by the water level in the Eno River. Recommendations • Groundwater level information should continue to be collected from the regolith and bedrock observation wells in the Orange Well Net. Currently, routine data collection from the five bedrock and three regolith wells is occurring and little, if any, further expense is needed at this time to continue this process. Additional data will significantly increase the quantity of available information for each of the observation wells, thereby also increasing the quality and usefulness of the hydrographs for each of the wells. • If opportunities arise to add additional bedrock or regolith observation wells to Orange Well Net, evaluation and consideration of each well should take place. The original design of the observation well network included bedrock and regolith observation wells in each of the nine general bedrock lithologies in Orange County. The cost to incorporate additional existing wells into the well network would be relatively minor. • Given the recent loss of the Rocky Ridge bedrock well, in addition to the questionable value of the groundwater level information collected from the Ray Road and Confluence Property bedrock wells, concerted effort should be made to incorporate additional suitable bedrock observation wells into the well network. • The use of a co-located bedrock and regolith well pair would be a valuable addition to OWN. A pair of wells in the same location would provide detailed information concerning ground- water recharge and groundwater level response to precipitation events. • Continue to upload groundwater level information to the DWR web site. This will allow the public to have access to the groundwater level information collected in Orange County at no cost to either the County or to members of the public. • Pursue statistical analyses of collected groundwater level information as additional ground- water level data is collected and available. • Continue to publicize Orange Well Net where appropriate. As more groundwater level infor- mation is collected, further use of the Orange Well Net data available on the DWR web site should be encouraged. 9