The Effects of Climate and Anthropogenic Activity on Hydrologic Features in Yanhe River
Table 3
Cumulative area and ratios of human measures in Yanhe River [37].
Year
Terrace
Silting dam
Afforestation
Grass planting
Total area
Area (Km2)
Ratio
Area (Km2)
Ratio
Area (Km2)
Ratio
Area (Km2)
Ratio
Area (Km2)
Total ratio
1959
4.13
8
4.62
9
41.33
82
0.33
1
50.41
0.7
1969
47.2
21
15.83
7
161.27
71
3.73
2
228.03
3
1979
97.53
23
28.73
7
286.93
67
17.47
4
430.66
5.7
1989
174.33
15
37.8
3
840.73
70
145.2
12
1198.06
15.8
1996
275.6
16
41.67
2
1100.2
66
259.87
15
1677.34
22.1
2000
219.6
14
38.1
3
1637.5
67
180.4
16
2577.4
34
2005
285.5
9
49.5
5
2128.8
68
243.5
18
3350.6
44.1
Ratio indicates the ratio of the area in each period and total measured area. Total ratio indicates the ratio of the total measured area and total area of watershed.
