Area	Lower Big River
Topic	Sediment: Matthews Erosion Rates from Roads Surfaces Little NF

Caption:  The Source Table sediment_road_surferosion_rates_all.dbf was derived from Matthews and Associates (2001) Table 29. Surface erosion rates (tons/yr) were computed using method of Reid (1981) based on use function analysis (High, Moderate, Low, None) and application of sediment production rate (800, 80, 8, 0.8 tons/yr) modified by surfacing factors (.2, .5, and 1.0 for paved, rocked, and native surfaces, respectively) and by location delivery factors (0.8 for riparian roads within 200 of a stream course, and 0.2 for mid-slope roads). Ridge roads were assumed non-delivering. Each period of analysis spans back to the previous aerial photo year. See Info Links for more information. BASIN = Matthews sub-basin naming convention SHORT_NAME = abbreviation for use on charts Y19## = surface erosion rate (tons/yr) for the year of the aerial photos used in the calculation

 50 rows of a possible 56 have been displayed.

BASIN	SHORT_NAME	Y1936	Y1952	Y1965	Y1978	Y1988	Y2000	CALWATER
Lower Big	LOWER_BIG	406	485	502	675	725	902	lb
Laguna Creek	LAGUNA	36	95	129	168	276	468	lb
Big River Estuary	ESTUARY	137	180	247	373	465	603	lb
Middle Big	MIDDLE_BIG	113	277	720	808	958	1383	lb
Two Log Creek	TWO LOG	80	170	348	354	399	525	lb
LITTLE NORTH FORK	LITTLE_NF	258	416	566	787	960	1227	ln
Upper North Fork Big	UPPER_NF	0	167	482	646	691	912	nf
James Creek	JAMES	0	102	419	488	579	732	nf
Chamberlain Creek	CHAMBERLAIN	18	532	907	1201	1231	1241	nf
East Branch NF Big	EAST_BR_NF	0	93	134	532	587	688	nf
Lower North Fork Big	LOWER_NF	48	360	525	707	770	835	nf
Upper Mainstem Big	UPPER_MAIN	0	197	667	738	905	1173	ub
Martin Creek	MARTIN	0	135	326	421	493	746	ub
Lower Mainstem Big	LOWER_MAIN	0	106	353	597	928	1177	ub
Upper South Fork Big	UPPER_SF	0	172	336	352	362	446	sf
Middle SF Big	MIDDLE_SF	0	294	642	732	754	906	sf
Lower South Fork Big	LOWER_SF	3	87	398	1061	1203	1535	sf
Daugherty Creek	DAUGHERTY	0	337	701	952	1024	1286	dc

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To learn more about this topic click here .
To download the table with the chart's source data, click sediment_road_surferosion_rates_all.dbf (size 2,212 bytes) .
To see meta information about the data table used for this topic click here
 
 

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