▁long . ▁This ▁l ago on ▁extends ▁from ▁E rav ur ▁( B att ical oa ▁district ) ▁in ▁the ▁north ▁to ▁Kal mun ai ▁( Am para ▁district ) ▁in ▁the ▁south . ▁This ▁l ago on ▁opens ▁into ▁the ▁sea ▁at ▁two ▁points . ▁One ▁in ▁the ▁southern ▁end ▁of ▁the ▁l ago on ▁at ▁K all ar ▁and ▁the ▁other ▁is ▁mid way ▁of ▁the ▁l ago on ▁at ▁Pal ame en m adu ▁which ▁is ▁close ▁to ▁the ▁Batt ical oa ▁town . ▁Both ▁are ▁narrow ▁and ▁approximately ▁ 2 0 0 ▁m ▁wide . ▁The ▁width ▁of ▁the ▁water ▁flow ▁at ▁their ▁open ings ▁var ies ▁with ▁the ▁seasons . ▁During ▁the ▁dry ▁season ▁the ▁width ▁of ▁the ▁bar ▁mouth ▁of ▁the ▁l ago on ▁decre ases ▁and ▁gradually ▁it ▁get ▁closed ▁with ▁the ▁on set ▁of ▁the ▁north ▁east ▁mon so on ▁which ▁p iles ▁up ▁the ▁sand ▁bar ▁by ▁the ▁end ▁of ▁dry ▁season . ▁Later ▁with ▁the ▁ra ins ▁and ▁with ▁the ▁l ago on ▁mouth ▁closed . ▁ ▁The ▁l ago on ▁is ▁fed ▁by ▁a ▁number ▁of ▁small ▁rivers . ▁It ▁is ▁linked ▁to ▁the ▁sea ▁by ▁a ▁two ▁narrow ▁channels , ▁one ▁at ▁Batt ical oa ▁and ▁the ▁other ▁at ▁Per iy ak all ar . ▁During ▁the ▁dry ▁season ▁these ▁channels ▁are ▁blocked ▁by ▁sand ▁bars . ▁ ▁The ▁l ago on ▁is ▁surrounded ▁by ▁a ▁dens ely ▁populated ▁region ▁used ▁for ▁cultiv ating ▁rice , ▁co con ut ▁and ▁other