42 U.S.C. § 1962d: Delmarva Peninsula hydrologic study; duties of Secretary of the Interior

appraise the water use, requirements, and trends, and determine the availability of water in the streams and underground sources for the entire peninsula; determine the depths, thicknesses, and permeabilities, the perennial yield, and the recharge characteristics of major aquifers, and the quality characteristics to be expected from each such major aquifer; determine with respect to ground water resources the continuity and extent of important water-bearing formations; determine the yield from stream systems under natural flow conditions and under varying degrees of storage and the amounts and quality of waters available from such systems during drought, flood, and intermediate conditions; determine whether sea water has moved inland into heavily pumped coastal aquifers; give special consideration to conditions which may invite the invasion of sea water into fresh-water supplies; compile and make available to appropriate State and local officials any results of this study and investigation that would be appropriate for their use in long-range planning, development, and management of water supplies; cooperate with State and local agencies for the purpose of using any information and data available to carry out the purposes of this study; and consider such other matters as the Secretary may deem appropriate to the study and investigation herein authorized.