... REGION The rainfall catchment area adjoining and impacting the GBR Marine Park totals 424 ,000 km 2 not including the influence from rivers intruding into the GBR fromPapua New Guinea and Irian ... 1974–1975 8,4 82, 719 41.53 2. 4 21 1997–1998 8,047,517 43.64 2. 3 22 1970–1971 6,136,544 45.76 2. 2 23 1958–1959 6,0 02, 436 47.88 2. 1 24 1983–1984 5 ,28 7,534 50.00 2. 0 25 1977–1978 5,170,4 92 52. 12 1.9 26 1959–1960 ... 22 and 24 February, 20 00 (Figure 10) alsodemonstrated an intrusion of river plumes into the mid-shelf reefs of the Cairns sec-tion of the GBR. The across-shelf transects measured lower salinity...