Table 1 The description of sampling points.
Sample num. | Depth (m) | Location | District | Geographical coordinates | ||
|---|---|---|---|---|---|---|
ψ (N) | λ (E) | |||||
Yellow river basin | YS01-30 | 0–3.0 | Yesheng Town, Qingtongxia County, Ningxia Province | Upper yellow river | 106°06′45″ | 38°07′06″ |
HL01-30 | 0–3.0 | Helan County, Yinchuan City, Ningxia Province | 106°33′03″ | 38°30′42″ | ||
LK01-86 | 0–5.0 | Lankao County, Kaifeng City, Henan Province | Lower yellow river | 114°57′23″ | 34°54′27″ | |
Haihe river basin | SJZ01-30 | 0–3.0 | Shijiazhuang City, Hebei Province | Mountain-front plain | 114°28′33″ | 38°04′59″ |
LC01-26 | 0–3.0 | Luancheng County, Shijiazhuang City, Hebei Province | 114°40′58″ | 37°53′16″ | ||
SZ01-30 | 0–3.0 | Shenzhou County, Hengshui City, Hebei Province | Central alluvial plain | 115°30′58″ | 37°59′14″ | |
XX01-30 | 0–3.0 | Xianxian County, Cangzhou City, Hebei Province | 116°10′11″ | 38°12′29″ | ||
HJ01-30 | 0–3.0 | Hejian County, Cangzhou City, Hebei Province | 116°07′55″ | 38°23′53″ | ||
DC01-30 | 0–3.0 | Dacheng County, Langfang City, Hebei Province | Eastern coastal plain | 116°38′20″ | 38°39′37″ | |
BH01-30 | 0–3.0 | Binhai new-region, Tianjin City | 117°32′24″ | 39°00′48″ | ||
