Table 5

1 January 2000

Table 5 Results of Silt Reduction Calculations for Cuntan Hydrometric Station due to Silt-holding by Upstream Reservoirs

Catchment	Reservoir size	Annual sedimentation of reservoir aggregations (104tons)	Distance between gravity center of reservoir aggregation and outlet station in catchment (km)	Distance between catchments outlet station and Cuntan station (km)	Sedimentation impact coefficient for Cuntan station (%)	Silt reduction due to reservoir silt-holding for Cuntan station (104tons)
Jialing River	Large-sized	1985	790	67	9.69	192
	Medium and small-sized	1974	234~450	67	41~23.4	809~462
Tuojiang River	Large to small-sized	856	500	354	14.9	128
Minjiang River	Large to small-sized	2175	280	418	21.1	459
Jinsha River	Large to small-sized	1465	810	444	6.2	91
Upper Yantze	Medium and small-sized	494	300~350		41.1~36.1	203~178
Total		8949			21~16.9	1882~1510

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