▁par ks ▁make ▁use ▁of ▁the ▁river ▁for ▁wal ks , ▁the ▁longest ▁of ▁which ▁is ▁in ▁Ford bridge ▁Park , ▁Ash ford . ▁ ▁Being ▁otherwise ▁private , ▁even ▁experienced ▁can oe ists ▁do ▁not ▁travel ▁the ▁river / stream ▁given ▁its ▁re ed ier ▁sections , ▁short ▁bar rages ▁and ▁upper ▁cul ver ts . ▁ ▁Flow ▁In ▁terms ▁of ▁flow ▁of ▁the ▁seven ▁distrib ut aries , ▁it ▁is ▁mid - rank ed , ▁ahead ▁of ▁S we eps ▁D itch , ▁St aines ▁( no ▁longer ▁a ▁distrib ut ary ▁of ▁the ▁Col ne ▁since ▁building ▁works ▁in ▁St aines ▁in ▁the ▁ 1 9 7 0 s ) ▁and ▁the ▁long ▁but ▁orn amental ▁Duke ▁of ▁North umber land ' s ▁the ▁Long ford ▁R ivers , ▁usually . ▁ ▁It ▁is ▁below ▁the ▁size ▁of ▁the ▁short ▁final ▁main ▁River ▁Col ne ▁channel ▁itself , ▁the ▁Col ne ▁Brook ▁and ▁the ▁River ▁W ray s bury ▁which ▁just ▁rejo ins ▁the ▁tr unk ▁of ▁the ▁Col ne ▁tens ▁of ▁metres ▁from ▁the ▁Th ames ▁so ▁is ▁( arg u ably ) ▁the ▁sevent h ▁distrib ut ary . ▁ ▁So il ▁divide ▁and ▁water ▁characteristics ▁All u vi um ▁on ▁gra vel ▁( with ▁London ▁Clay ▁out cro ps , ▁such ▁as ▁H arrow ▁on ▁the ▁Hill , ▁H amp st ead ▁He ath ▁and ▁the ▁H ert ford shire ▁border ▁hills ) ▁is ▁the ▁soil ▁profile ▁of ▁the ▁north ▁bank , ▁west ▁of ▁the ▁City ▁of