ab c d 6 12 1:25,000 28 3 2-1-3 18 2-1-10 25000
3120 10 14 15 16 7 2-1-4
1000ha 10100ha 110ha ha ha km 200ha 100m
0.3 ha 100m 1m
2-1-11 2-1-5 20cm 2-1-12 20cm
2003 1 05 12
2-1-13 1968 10 7 1968 7
1897 1951
500m 3 /s 9ha
2-1-14 2-1-15 2-1-14 29
2-1-14 17 50 61 84 2-1-15
10 500m 2-1-16 2-1-6
4
2-1-17