In connection with these "good- faith" negotiations, the staff of the 

 Delaware River Basin Commission (DRBC) was asked to provide answers to various 

 questions pertaining to the need for regulation of Delaware River flows at 

 Trenton to control water quality in the Delaware estuary, and in particular to 

 control salinity intrusion. Answers to some of these questions were provided 

 with the aid of a deterministic, time -varying, mathematical model developed 

 for DRBC by Thatcher and Harleman (1978). This model can be used to predict 

 changes in salinity caused by such factors as depletive water use, including 

 both in-Basin consumptive use and out-of -Basin diversions, streamflow regula- 

 tion by impoundments , and changing sea- level. 



The purpose of this paper is to examine the potential effect on Delaware 

 estuary salinity of a rising sea-level at the mouth of Delaware Bay. 

 (Introduction) . 



157 INQUE, M. , and O'BRIEN, J. J. 1987. "Trends in Sea-Level in the 

 Western and Central Equatorial Pacific During 1974-1975 to 1981," Journal of 

 Geophysical Research . Vol 92, No. C5 , pp 5045-5051. 



The sea- level records at the nine island stations located in the western 

 and central equatorial Pacific show trends for the period 1974-1975 to 1981 

 which are well hindcasted by the linear numerical model of Busalacchi and 

 O'Brien forced by the observed ship winds. The spatial pattern of these 

 trends suggests that the western equatorial Pacific was losing water while the 

 central equatorial Pacific was gaining water. These trends appear to be due 

 to the significant weakening of the near-equatorial easterly trades in the 

 central Pacific which took place throughout the period 1974-1981. The trend 

 reversal observed in 1977-1978 in sea-level at the island stations located 

 south of the equator (Rabaul and Honiara) appear to be due to a similar trend 

 reversal in the strength of the large-scale southeast trades. (Authors). 



158 JAMES, L. D., BOWLES, D. S., and ISRAELSEN, E. K. 1985. "The Use of 



Hydrologic Data on the Economic and Financial Analysis of Lake Level Control 



Alternatives," Problems of and for Predicting Great Salt Lake Levels Proc . . 

 Center of Public Affairs, Univ. of Utah, pp 261-277. 



The rising surface of the Great Salt Lake is forcing increasing numbers 

 of property owners to decide between protecting their holdings or moving out. 

 Federal, state, and local governments are considering levees to protect criti- 

 cal facilities, lake level control through pumping to the West Desert, and 

 through water development to increase consumptive use. Both private and 

 public choices are being made with uncertainty as the lake could rise to cause 

 devastating damage or recede harmlessly. Governmental agencies know that many 

 people face economic disaster if they fail to act and the lake continues to 

 rise. Action is expensive; and if the lake falls, the agencies face charges 

 of poor management. We must recognize that while we cannot predict when 

 flooding will occur (through continuation of the present rise or during some 

 future event) , we can express risk with a probability distribution, estimate 

 damages in expected values and compare the expected reduction in damages with 

 costs. (Authors). 



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