Figure 1 B.csv
Relationship between discharge and macrophyte cover in the model.
Discharge		: Simulated channel discharge (m3 s-1)
MacrophyteCover	: Modelled percentage macrophyte cover (fraction of vegetated cells over the whole simulated domain)

Figure 1 C.csv
Relationship between macrophyte cover and river discharge as found in the field for the two chalk stream study sites.
Month			: Survey month and year
Discharge		: Measured river discharge on survey date (m3 s-1)
MacrophyteCover	: Macrophyte cover in the stream reach on survey date (%)
Site	: Identification of the study site. ‘Mixed’ site is Bere Stream; ‘DominantSubmergents’ is Frome Vauchurch

Figure 2 A.csv
Model predictions of average flow velocities (m s-1) for increasing values of discharge, calculated within vegetated and unvegetated sections of the channel, and compared with cross-sectional average flow velocities
Discharge		: Simulated channel discharge (m3 s-1)
VegetatedFlow	: Average flow velocity (m s-1) within vegetated cells of the simulated domain 
UnvegetatedFlow	: Average flow velocity (m s-1) within unvegetated cells of the simulated domain 
CrossSectionalAverage: Cross-sectional average flow velocity (m s-1) in the simulated channel

Figure 2 B C Discharge.csv
River discharge (m3 s-1) and cross-sectional average flow velocity (m s-1) in the two study sites at each survey date.
Discharge		: Measured river discharge on survey date (m3 s-1)
CrossSectionalAverage: Cross-sectional average flow velocity (m s-1) in the stream
Site	: Identification of the study site. ‘Mixed’ site is Bere Stream; ‘DominantSubmergents’ is Frome Vauchurch
Month			: Survey month and year


Figure 2 B C.csv
Relationship between discharge (m3 s-1) and flow velocity (m s-1) in both vegetated and unvegetated river portions in the two study sites, compared with the cross-sectional average flow velocity in the stream.
Transect	: Transect location (1-m distance intervals along the 30-m study reach)
Width			: Measurement point location along each transect (0.5 m intervals)
SubstrateType		: Substrate type in the measurement point (vegetated/unvegetated) 
WaterVelocity		: Depth-averaged flow velocity at the measurement point (m s-1)
Month			: Survey month and year
Site	: Identification of the study site. ‘Mixed’ site is Bere Stream; ‘DominantSubmergents’ is Frome Vauchurch


Figure 3 A.csv
Relationship between discharge and mean total water level in the model.
Discharge		: Simulated channel discharge (m3 s-1)
WaterDepth		: Mean total water level (m) in the simulated channel
SimulatedChannel	: Starting conditions in the simulated channel; without vegetation (Unvegetated), vegetation homogeneously distributed over the channel bed (HomogeneousVegetation), or self-organized vegetation (SelfOrganizedVegetation)

Figure 3 B.csv
Field measurements on the relationship between river discharge (m3 s-1) and mean total water level (m) in the ‘mixed vegetation’ and ‘dominant submerged’ study sites.
Transect	: Transect location (1-m distance intervals along the 30-m study reach)
Width			: Measurement point location along each transect (0.5 m intervals)
Depth			: Water depth (m) in the measurement point
Month			: Survey month and year
Site	: Identification of the study site. ‘Mixed’ site is Bere Stream; ‘DominantSubmergents’ is Frome Vauchurch

ChannelFlow2D.m
Matlab code of the 2D model describing the interaction between plant growth and hydrodynamics within a spatially heterogeneous vegetated stream.
