Table 1.

Sampled source distributions in (sub) watersheds of the Bidwell watershed (UK) and the Chitlang watershed (Nepal) where P = pasture, CU = cultivated land, RM = road-derived material and CB = channel bank, BLF = broad leaf forest, MF = mixed forest, LL = lowland terraces and UP = upland terraces. Mix 1–2 (Bidwell) and Mix 1–3 (Chitlang) refer to Fig. 1b and c respectively.

Watershed unit	Model Component	Source land cover (%)				Area (km2)
		P	CU	RM	CB
Upper Bidwell	Mix 1	42	47	<1%	<1%	4.20
Lower Bidwell	Mix 2	51	38	<1%	<1%	7.90
		BLF	MF	LL	UP
Dandakharka	Mix 1	41	38	6	16	14.4
Kharka	Mix 2	n/a	48	7	44	1.00
Upper Chitlang	Mix 3	38	36	6	19	15.4

Note the remainder of land cover in Bidwell Brook is largely stable woodland which was not included in the model.