This table contains historic Chesapeake Bay annual mean streamflow values for the Susquehanna River and the Potomac River calculated using documented methods. Annual mean streamflow values for the Susquehanna and Potomac Rivers are calculated directly from USGS gaging-station data. Sections A and B provide cumulative streamflow values for flow entering the bay at each of these defined cross sections (see Bue, 1968). Section B-C provides incremental streamflow values for flow entering the bay between two defined cross sections.

Water Year	Susquehanna	Section A	Section A-B, (incr.)	Section B	Potomac	Section B-C (incr.)	Section C
2021	37,972	39,886	6,525	46,411	11,567	14,704	61,114
2020	37,258	38,932	6,526	45,458	9,899	12,761	58,219
2019	62,294	64,954	8,813	73,767	22,780	27,670	101,437
2018	55,758	58,183	8,108	66,292	19,787	24,287	90,578
2017	40,174	42,083	6,667	48,750	9,323	12,101	60,851
2016	28,327	29,863	5,530	35,393	11,770	14,973	50,366
2015	30,629	32,265	5,785	38,050	9,110	11,846	49,896
2014	36,366	38,193	6,291	44,483	14,201	17,860	62,343
2013	34,817	36,583	6,217	42,800	12,276	15,719	58,519
2012	40,461	42,380	6,670	49,050	11,254	14,473	63,523
2011	67,408	70,442	9,408	79,850	14,353	17,833	97,683
2010	34,379	36,113	6,073	42,185	13,613	17,014	59,199
2009	32,026	33,702	5,940	39,642	9,477	12,228	51,870
2008	42,335	44,345	6,822	51,167	11,024	14,039	65,206
2007	38,301	40,203	6,383	46,587	11,075	14,113	60,700
2006	43,117	45,125	7,008	52,133	9,368	12,220	64,353
2005	43,399	45,408	6,869	52,278	12,738	16,201	68,478
2004	60,367	62,892	8,633	71,525	18,490	23,001	94,526
2003	51,192	53,433	7,825	61,258	23,460	28,662	89,920
2002	27,410	28,913	5,303	34,217	4,649	6,274	40,491
2001	25,649	27,122	5,224	32,346	8,353	10,937	43,283
2000	37,358	39,208	6,417	45,625	8,945	11,718	57,343
1999	23,526	24,893	4,871	29,764	5,724	7,625	37,389
1998	47,301	49,399	7,312	56,711	20,899	25,308	82,019
1997	42,625	44,587	6,888	51,475	15,051	18,833	70,308
1996	51,775	54,108	7,808	61,917	24,393	29,758	91,674
1995	27,070	28,565	5,367	33,932	8,653	11,321	45,253
1994	52,750	55,208	8,050	63,258	18,938	23,123	86,381
1993	48,768	51,180	7,820	59,000	17,417	21,176	80,176
1992	27,977	29,536	5,548	35,083	8,322	10,879	45,963
1991	40,669	42,539	6,531	49,070	12,590	15,892	64,962
1990	35,608	37,392	6,317	43,708	9,487	12,383	56,092
1989	35,795	37,593	6,265	43,858	11,403	14,504	58,363
1988	27,939	29,492	5,492	34,983	10,263	13,115	48,098
1987	34,596	36,346	6,163	42,508	11,908	15,058	57,566
1986	38,455	40,358	6,483	46,842	12,623	15,813	62,655
1985	25,406	26,863	5,204	32,067	8,759	11,450	43,517
1984	50,763	53,043	7,657	60,700	18,874	23,218	83,918
1983	34,508	36,282	6,063	42,345	12,843	16,027	58,372
1982	36,639	38,456	6,310	44,766	11,252	14,308	59,074
1981	26,551	28,046	5,246	33,292	6,938	9,191	42,483
1980	35,462	37,226	6,185	43,411	16,218	20,239	63,650
1979	42,775	44,883	6,908	51,792	16,719	20,793	72,584
1978	58,592	61,075	8,325	69,400	16,543	20,613	90,013
1977	41,833	43,867	6,858	50,725	11,048	13,974	64,699
1976	43,825	45,900	7,042	52,942	10,486	13,510	66,452
1975	46,711	48,817	7,267	56,083	14,558	18,339	74,423
1974	43,267	45,292	6,992	52,283	11,993	15,322	67,605
1973	48,043	50,198	7,368	57,567	17,638	21,968	79,535
1972	59,909	62,532	8,777	71,308	19,083	23,613	94,922
1971	40,432	42,362	6,672	49,033	14,194	17,923	66,956
1970	37,350	39,280	6,360	45,640	11,014	14,063	59,703
1969	27,043	28,572	5,428	34,000	5,322	7,243	41,243
1968	34,565	36,298	6,164	42,462	10,442	13,451	55,913
1967	31,648	33,321	5,819	39,140	10,447	13,427	52,567
1966	26,056	27,508	5,142	32,649	5,967	7,888	40,538
1965	19,264	20,457	4,365	24,822	9,046	11,593	36,415
1964	31,828	33,434	5,618	39,052	9,655	12,314	51,366
1963	27,660	29,194	5,438	34,633	8,569	10,943	45,575
1962	27,315	28,781	5,261	34,042	10,981	13,851	47,893
1961	35,327	37,084	6,183	43,267	11,938	14,955	58,222
1960	46,983	49,142	7,358	56,500	12,228	15,578	72,078
1959	28,999	30,562	5,529	36,091	5,788	7,755	43,846
1958	40,133	42,136	6,640	48,776	12,786	16,155	64,931
1957	34,696	36,433	6,048	42,480	9,715	12,527	55,007
1956	45,250	47,375	7,142	54,517	9,213	11,923	66,439
1955	30,243	31,866	5,744	37,610	13,114	16,659	54,269
1954	26,526	27,984	5,168	33,153	5,663	7,567	40,719
1953	38,854	40,682	6,375	47,057	13,677	17,213	64,270
1952	43,596	45,619	6,902	52,521	14,149	17,706	70,227
1951	49,536	51,744	7,493	59,238	16,094	20,108	79,346
1950	38,724	40,592	6,483	47,075	10,738	13,817	60,892
1949	32,574	34,239	5,861	40,100	16,418	20,622	60,722
1948	36,611	38,466	6,189	44,655	9,784	12,658	57,313
1947	38,108	39,975	6,475	46,450	6,889	9,177	55,627
1946	45,923	48,023	7,228	55,250	10,874	14,032	69,282
1945	41,784	43,825	6,958	50,783	11,163	14,397	65,180
1944	32,150	33,798	5,825	39,623	8,635	11,113	50,736
1943	47,487	49,613	7,243	56,856	16,341	20,328	77,183
1942	31,128	32,764	5,728	38,493	8,748	11,374	49,867
1941	25,822	27,305	5,222	32,527	8,940	11,685	44,212
1940	34,893	36,822	6,347	43,168	11,158	14,279	57,448
1939	31,860	33,493	5,671	39,164	10,980	13,980	53,144
1938	35,267	37,050	6,217	43,267	10,413	13,463	56,730
1937	40,254	42,167	6,792	48,958	15,686	19,578	68,536