Impacts of Groundwater Recharge from Rubber Dams on the Hydrogeological Environment in Luoyang Basin, China

Table 5

Analysis of surface water quality.

Time	pH	TH (mg/L)	TDS (mg/L)	NO3-N (mg/L)	NH4-N (mg/L)
Oct. 1998	7.65	207.4	265.3	2.25	0.14
Oct. 1999	7.43	189.3	212.7	1.75	0.07
Oct. 2000	7.51	211.3	237.6	2.56	0.11
Oct. 2002	7.52	194.3	256.1	1.87	0.05
Nov. 2003	7.81	250.7	344.6	3.07	0.27
Oct. 2004	7.58	215.2	310.5	3.14	0.19
Nov. 2005	7.62	245.2	320.1	2.98	0.23
Oct. 2007	7.42	237.1	312.1	4.12	0.21
Nov. 2008	7.35	225.2	330.4	2.73	0.16
Nov. 2010	7.36	232.6	310.7	2.58	0.15
Oct. 2011	7.41	253.2	338.9	2.32	0.17
Nov. 2012	7.63	211.5	289.4	3.15	0.22