GROUND WATER - Status of Quantitative Ground-Water Hydrology UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY RESTON, VIRGINIA 22092 GW Branch March 29, 1978 Code 4351 5016 GROUND WATER BRANCH TECHNICAL MEMORANDUM NO. 78.05 Subject: GROUND WATER - Status of Quantitative Ground-Water Hydrology John D. Bredehoeft has provided a small supply of his keynote address at the 1976 AWRA Symposium on Advances in Groundwater Hydrology, a copy of which is enclosed for routing among your interested staff members. Entitled "Status of Quantitative Groundwater Hydrology", the paper is an excellent abbreviated statement on (1) present capabilities and recent advances in quantitative simulation of hydraulic and geochemical ground-water systems, (2) the need for more-realistic descriptions of physical and geochemical characteristics of ground-water systems in order to take fuller advantage of expanding modeling capabilities, and (3) increasing usage of ground-water quantitative methodologies in the solution of engineering, economic, and management problems. A few extra copies are available upon request. (s) Gerald Meyer Chief, Ground Water Branch Enclosure WRD DISTRIBUTION: A (Limited), FOLS