03457nam a2200265 a 4500 120117s1994 neia b 000 0 eng d 99227606 9054101423 DLC DLC DLC BD-KhUET 627.1352 21 Water quality control at ship locks : prevention of salt- and fresh water exchange / J. Kerstma ... [et al.]. Rotterdam ; Brookfield, VT : A.A. Balkema, 1994. xi, 92 p. : ill. ; 26 cm. Bibliography: p. 91-92. Machine generated contents note: 1 INTRODUCTION -- 1.1 General -- 1.2 Listing of interest groups in water management -- 1.3 Prevention of salinisation in the Netherlands -- 2 MANAGEMENT OF A BASIN RELATED TO THE PROBLEM -- OF SALINE INTRUSION -- 2.1 Comparison of the situation in an estuary before and after closure -- 2.2 Quality control of a fresh-water bay: Prevention of salt intrusion -- 2.3 Ship locks as a source of salt intrusion -- 2.4 Salt-content distribution over the basin -- 3 OVERVIEW OF POSSIBLE MEASURES TO REDUCE SALT- -- FRESH WATER EXCHANGE AT SHIP LOCKS -- 4 FURTHER ANALYSIS OF MEASURES REDUCING SALT-FRESH -- WATER EXCHANGE WITH SYSTEMS ALLOWING THE GATES -- TO BE OPENED IMMEDIATELY AFTER LEVELLING -- 4.1 Analysis of the reference situation without special measures -- 4.1.1 The various stages of operation -- 4.1.2 General considerations of salt penetration -- 4.2 Measures for management -- 4.3 Flushing the basin to prevent salt intrusion -- 4.4 Pumping back the salt water lockage prism -- 4.5 Soonest possible closure of gates in combination with an air curtain -- V -- 4.6 System Tereuzen (flushing back salt penetration directly and -- indirectly) -- 4.7 Comparison of the various systems that enable the gates to be -- opened immediately after levelling -- 5 FURTHER ANALYSIS OF SALT-FRESH WATER SEPARATION -- SYSTEMS THAT INTERCHANGE THE CHAMBER’S VOLUME -- BEFORE GATES ARE OPENED -- 5.1 System Dunkerque/Kreekrak/Krammer -- 5.2 System Hansweert -- 5.3 The system ’salt lift trough’ -- 5.4 Comparison of the various systems which interchange the -- chamber volume with closed gates -- 6 MANAGEMENT OF SALT-FRESH WATER -- SEPARATION SYSTEMS -- 7 EFFECTIVITY OF ALL SALT-FRESH SEPARATION SYSTEMS -- COMPARED WITH STANDARDS FOR WATER QUALITY -- 7.1 Theoretical approach -- 7.2 Practical approach -- 8 CONCLUDING OBSERVATIONS -- APPENDIX A: Total salt-fresh water interchange per lock operation cycle -- when rate of local interchange, 0, is known -- APPENDIX B: Theoretical approach of the air quantity needed for an air -- curtain as a salt-fresh separation system -- APPENDIX C: Calculation of the maximum force athwartships in salt -- water, with a fresh water bubble situated on one side -- APPENDIX D: Minimum discharge requirement to prevent salt water -- intrusion in a wall slot -- BIBLIOGRAPHY. Locks (Hydraulic engineering) Water quality management. Saltwater encroachment. Kerstma, J. Table of Contents http://www.loc.gov/catdir/toc/fy02/99227606.html Publisher description http://www.loc.gov/catdir/enhancements/fy0908/99227606-d.html 3018 3018 0 0 ddc 0 0 KUETCL KUETCL GEN 1998-06-29 Karim international 2070.00 0 627.1352 WAT 3010020113 2012-01-17 00:00:00 1 BK