Table 7. Footnotes 



Width and area ratings: 



_ Parameter in the mined area 



R Parameter upstream from the mined area 



where the parameter is: 



• top width of the channel Is) during the survey period for Channel Width 



• top width of the channel (si during floods of approximately Dank-full 

 flood magnitude for Flooded Area 



• area of ponded water, excluding pits, for Ponded Area. 



* Wr, 



2.5 < Wpj < 3 



< Wp < 2.5 



I . 5 < Wp < 2 



6 I ^ *□ 1 '-5 or ether W values if they are within the natural 

 range of variation of the river 



5 W • I or i f other data indicates no change 



4 0.67 1 W < I or other W values if they are within the natural 

 range of variation of the river 



5 0.50 ^ Wr '^ 0.67 

 0-2 Not used 



Overal I slope ratings: 



_ Length of disturped reach after gravel removal 

 R ~ Length of disturbed reach before gravel removal 



10 

 9 

 8 

 7 

 6 

 5 



/L 



R 

 .2 < S„ 



Lr ^°-^' 



0.71 < L^ 



0.77 



I .3 or 0.77 < L„ < 0.83 



K — — R 



I < S„ < I .2 or 0.83 < L„ < 0.91 



.0 < S^ < I.I 



or 0.91 < Lp 



.0 



Sr^Lr 



I or i f other data indicate no change 



0-4 Not used 



"Local slope redistribution ratings: 



10 Very steep slope followed by a very long pool 

 9 Steep slope followed by a long pool 



8 Moderate slope followed by slightly longer than average pool 



7 Slope and pool length slightly more than that in the undisturbed 

 areas 



6 Some local slope redistribution detected or likely to have occurred 

 but not likely that of the natural river 



5 No local slope redistribution 

 0-4 Not used 



Flow obstruction ratings: 



10 Obstructions in an active low-water channel such that flow is 

 di verted 



9 Obstructions adjacent to an active low-water channel 



8 Obstructions in or adjacent to high-water channels 



7 Obstructions in the floodplain but away from any developed channels 



6 Small obstructions not much different in size from those occurring 

 naturally in the floodplain 



5 No obstruct ions 



0-4 Not used 



110 



