Distributions and Sources of Sedimentary Sterols as well as Their Indications of Sewage Contamination in the Guanting Reservoir, Beijing

Table 1

General information of sampling points in the Guanting Reservoir.

Sampling area	Sampling section	Sampling point	Latitude	Altitude
Yongding River reservo\ir area	S1	G1	40°14.7′	115°36.12′
		G2	40°14.7′	115°35.25
	S2	G3	40°14.5′	115°36.18′
		G4	40°14.57′	115°35.55′
		G5	40°14.58′	115°35.31′
	S3	G6	40°16.16′	115°36.31′
		G7	40°16.11′	115°35.46′
	S4	G8	40°17.43′	115°37.20′
		G9	40°18.57′	115°37.4′
		G10	40°18.16′	115°37.28′
	S5	G11	40°21.7′	115°41.33′
		G12	40°21.11′	115°41.21′
		G13	40°20.22′	115°41.2′
Guishui River reservoir area	S6	G14	40°20.49′	115°43.43′
		G15	40°20.55′	115°43.31′
		G16	40°21.6′	115°43.17′
	S7	G17	40°21.17′	115°45.19′
		G18	40°21.28′	115°45.11′
		G19	40°21.35′	115°45.13′