▁park ▁in ▁Tak sha . ▁N ika ▁ch hu ▁river ▁dra ins ▁the ▁Ch ende b ji ▁valley ▁in ▁the ▁northern ▁part ▁of ▁the ▁park ▁by ▁joining ▁the ▁Mang de ch u ▁river . ▁N umer ous ▁other ▁streams ▁and ▁riv u lets ▁origin ate ▁from ▁the ▁snow - f ed ▁al pine ▁la kes ▁in ▁Black ▁Mountain ▁area , ▁and ▁mel ting ▁snow ▁and ▁mon so on ▁rain ▁contribute ▁to ▁the ▁water ▁volume . ▁This ▁network ▁of ▁small ▁per enn ial ▁and ▁annual ▁trib ut aries ▁flow ▁down ▁the ▁ste ep ▁s lop es , ▁often ▁as ▁water falls , ▁and ▁along ▁the ▁valle ys ▁to ▁become ▁trib ut aries ▁of ▁the ▁larger ▁rivers . ▁The ▁distinct ▁ra iny ▁and ▁dry ▁seasons ▁results ▁in ▁wide ▁season al ▁variations ▁in ▁the ▁river ▁flows , ▁with ▁large ▁volumes ▁of ▁sed iment - lad en ▁water ▁flow ing ▁during ▁the ▁mon so on ▁and ▁low ▁volume ▁during ▁the ▁dry , ▁winter ▁season . ▁ ▁The ▁local ▁communities ▁also ▁rely ▁on ▁the ▁water ▁from ▁these ▁rivers ▁for ▁domestic ▁and ▁for ▁ir rig ation , ▁and ▁contrib uting ▁to ▁the ▁withdraw al ▁from ▁the ▁rivers . ▁ ▁There ▁are ▁several ▁major ▁hyd rop ower ▁plants ▁being ▁constructed ▁along ▁the ▁R ivers ▁of ▁P un ats ang ch u , ▁Mang de ch u ▁and ▁the ▁N ika ▁ch u , ▁which ▁fall ▁on ▁the ▁border ▁of ▁the ▁national ▁park . ▁ ▁Cl imate ▁The ▁wide ▁elev ation ▁range ▁and ▁the ▁mountain ous ▁terrain ▁create ▁complex ▁clim atic