KARAKTERISTIK ION NA+ DAN CA2+ TELAGA COASTAL AQUIFER DAERAH KAPUR MALANG SELATAN PADA PERIODE PASANG-SURUT
ABSTRACT: Ion Ca2+ discharge
have been investigated due to soil structrure around coastal aquifer lake in
limestone area at Bajulmati district Malang. As well as dynamica of ion Na+
consentration according tidal elevation dynamic on the lake. Consentration of
Na+ and Ca2+ have been measured quantitatively including phisyco-chemistry
variable influencing them, i.e. pH and tempeture. This study carried out in two
step, i.e. the fisrt, ion Ca2+ consentration measure horisontally dan
vertically for mapping of the origin of ion Ca2+ discharge. The second is
measurement of ion Na+ consentration at definite sampling location for five
different time with an hour range of each between tidal sea cycle. The result
is compared with sea elevation measurement as long as tidal sea cycle and
measurement of distance between coastal and the lake give a discription about
sea water intrusion dinamic to the lake. On mapping of ion Ca2+ consentration
horisontally and vertically, show that the discharge map of ion Ca2+ originate
only from a location in the edge of the lake that have cross section position
to the dam. It seem that the water in lake is originate from a groundwater
river. The ion Na+ consentration dynamic show a linear pattern according with
tidal sea elevation dynamic. There is a delay as long as intrussion process,
while the dynamical curve of ion Na+ consentration have a symmettrical graphic to
tidal sea elevasion dynamic curve.
Keyword: mapping, dynamic,
Ca2+, Na+, coastal aquifer lake, limestone area
Penulis: Barroroh
Kode Jurnal: jpperadabanislamdd070066
