▁ste ep ▁s lop es , ▁ex clos ures ▁have ▁been ▁established ; ▁the ▁dense ▁veget ation ▁largely ▁cont ributes ▁to ▁en hanced ▁in fil tr ation , ▁less ▁flo oding ▁and ▁better ▁base flow . ▁ ▁Ir rig ated ▁agricult ure ▁Besides ▁spr ings ▁and ▁res er voir s , ▁ir rig ation ▁is ▁strongly ▁dependent ▁on ▁the ▁river ' s ▁base flow . ▁Such ▁ir rig ated ▁agricult ure ▁is ▁important ▁in ▁meeting ▁the ▁dem ands ▁for ▁food ▁security ▁and ▁pover ty ▁reduction . ▁Ir rig ated ▁lands ▁are ▁established ▁in ▁the ▁all uv ial ▁plain ▁along ▁the ▁river , ▁particularly ▁west ▁of ▁Get ski ▁M eles iley . ▁ ▁Trans hum ance ▁towards ▁the ▁g orge ▁ ▁Trans hum ance ▁takes ▁place ▁in ▁the ▁summer ▁ra iny ▁season , ▁when ▁the ▁lands ▁near ▁the ▁villages ▁in ▁the ▁u pl ands ▁and ▁the ▁low lands ▁are ▁occupied ▁by ▁cro ps . ▁Young ▁she ph erd s ▁will ▁take ▁the ▁village ▁cattle ▁to ▁the ▁s lop es ▁at ▁the ▁river ▁head w aters . ▁ ▁B ould ers ▁and ▁p eb bles ▁in ▁the ▁river ▁bed ▁ ▁B ould ers ▁and ▁p eb bles ▁encountered ▁in ▁the ▁river ▁bed ▁can ▁origin ate ▁from ▁any ▁location ▁higher ▁up ▁in ▁the ▁bas in . ▁In ▁the ▁upp erm ost ▁st ret ches ▁of ▁the ▁river , ▁only ▁rock ▁fragments ▁of ▁the ▁upper ▁l ith ological ▁units ▁will ▁be ▁present ▁in ▁the ▁river ▁bed , ▁whereas ▁more ▁down stream ▁one ▁may ▁find ▁a ▁more ▁compreh