Dynamical Models of Interactions between Herds Forage and Water Resources in Sahelian Region

Table 2

Parameter values for transhumance in System (2).

Parameters	Description	Estimated value/range	Reference
𝑟^101	Intrinsic production of forage	10–20 kgDM/ha	[9]
𝑟^201	Intrinsic production of water	700–800 kgDM/ha	[9]
𝑟^102	Forage production without precipitations	5–10 kgDM/ha	[9]
𝑟^202	Water production without precipitations	100–200 mm/yr	[9]
𝑝	Precipitations	500–600 mm/yr	[9]
𝑟1^1	Intrinsic disappearance of forage resources	90–120 kgDM/ha	[9]
𝑟1^2	Intrinsic disappearance of water resources	150–250 mm/yr	[9]
𝑒1	Forage biomass conversion rate	0.015 per day	[10]
𝑒2	Water biomass conversion rate	0.0154 per day	[10]
𝑎1	Herd’s satiety rate from forage	0.03/ha	[10]
𝑎2	Herd’s satiety rate from water	0.02/ha	[10]
𝐾1	Maximal capacity of forage production	7000–9000 kgDM/ha	[10]
𝐾2	Maximal capacity of water production	900 mm/yr	[10]
𝑞1	Forage utilization rate	0.4 per day	[9]
𝑞2	Water utilization rate	0.6 per day	[9]
𝑚	Herd’s removal rate	1 per day	[10]