Soge, Petrus Dominikus Rudolf (2015) ANALISIS PENGARUH PENGGUNAAN LAHAN TERHADAP KUALITAS AIR SUNGAI GAJAH WONG DI KOTA YOGYAKARTA. Other thesis, UPN "Veteran" Yogyakarta.
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Abstract
ABSTRACT
Yogyakarta municipality’s increasing number of inhabitant and landuse, brings along
negative effects to its rivers. One of the rivers considered to be the waste dump is Gajah Wong
river. Studies conducted in this river have revealed that there is another source beside the
domestical waste that cause its water quality decrease such as industrial activities. The variations
in landuse along the Gajah Wong river, can bring depletio n in its water quality based on the
water quality standard of 2
nd
grade river body in the Act of DIY’s Governor number 20/2008.
This study was conducted to analyse the influence of landuse to the river’s water quality.
The method used in this study was descriptive-comparative with graphical plotting in the
map to show the impact in each sampling points. The method used in water sampling was
purpossive sampling, with nine sampling stations were selected based on the land use and were
subsequently subjected to standard analytical procedures. Satellite image and land survey were
used to analyse the landuse changing in the area. Water quality parameters observed were 8
parameters divided into physical, organic and anorganic chemical and microbiological.
The test conducted in laboratory demonstrates that TSS is valued between 15 – 38 mg/l,
pH 6,6 – 7,5 Nitrate 0,6 – 2,9 mg/l, BOD 7,2 – 36,99 mg/l, COD 15 – 38 mg/l, Phosphat 0,2 –
0,58, Oil/Grease 1000 – 5000 μg/l and Total Coliform 9000 - ≥ 240000 JPT/100 ml. Based on
the result above, some parameters, such as TSS, pH and Nitrate are still on the range of water
quality standard while BOD, COD, phosphat, Oil-grease and Total Coliform have overcame the
Water Quality Standard. The sampling points in which the parameters been so much increased
are points 3
rd
and 4
th
. These points are dominated mostly by urban areas and industrial activities
such as milk factory and leather handicraft. According to the result, one can say that the quality
of Gajah Wong river has not reach out with the standard of 2
nd
grade river body. To this result,
water quality monitoring and controlling must be held regularly to restore the quality back to its
normal designated beneficial water uses.
Keywords: Land use, Water quality, River and Water quality standard
INTISARI
Peningkatan jumlah penduduk dan lahan terbangun di Kota Yogyakarta, membawa serta
efek negatif berupa meningkatnya pencemaran pada badan air sungai. Salah satu sungai yang
sering menjadi tempat pembuangan limbah ialah sungai Gajah Wong. Beberapa penelitian
terdahulu, mengungkapkan bahwa selain karena limbah rumah tangga, sungai Gajah Wong juga
mengalami pencemaran dari aktivitas industri di sekitarnya. Akibat dari variasi penggunaan
lahan tersebut dikhawatirkan kualitas air sungai Gajah Wong tidak lagi memenuhi standar untuk
badan air sungai kelas II seperti yang tertera dalam Keputusan Gubernur DIY No. 22 Tahun
2007. Penelitian di badan sungai Gajah Wong Kota Yogyakarta ini bertujuan untuk mengetahui
bagaimana pengaruh penggunaan lahan terhadap kualitas air sungai tersebut.
Metode yang digunakan ialah deskriptif-komparatif dengan ploting grafik pada peta
untuk mengetahui pencemaran pada tiap titik. Pengambilan sampel dilakukan pada 9 titik yang
mewakili jenis penggunaan lahan di sekitar sungai dengan metode purpossive sampling. Analisis
terhadap jenis penggunaan lahan menggunakan citra satelit serta p emetaan lapangan. Parameter
kualitas air yang diuji dalam penelitian ini terdiri atas 8 parameter yang terbagi ke dalam
parameter fisik, kimia organik dan anorganik serta mikrobiologi.
Hasil uji laboratorium menunjukkan bahwa nilai TSS berkisar antara 15 – 38 mg/l, pH
antara 6,6 – 7,5 Nitrat 0,6 – 2,9 mg/l, BOD 7,2 – 36,99 mg/l, COD 15 – 38 mg/l, Fosfat 0,2 –
0,58, Minyak lemak 1000 – 5000 μg/l dan Total Coliform antara 9000 - ≥ 240000 JPT/100 ml.
Di antara hasil tersebut hanya 3 parameter yang tidak melampaui baku mutu yang ditentukan
yakni TSS, pH dan Nitrat. Parameter lainnya seperti BOD, COD, minyak lemak dan Total
Coliform mengalami peningkatan dari baku mutu yang ditetapkan. Titik yang paling banyak
mengalami perubahan kualitas air ialah titik 3 dan 4 yang jenis penggunaan lahannya didominasi
oleh permukiman padat serta industri kulit dan susu.
Kata kunci: Penggunaan Lahan, Kualitas Air, Limbah, Standar baku mutu
| Item Type: | Thesis (Other) |
|---|---|
| Subjek: | T Technology > TD Environmental technology. Sanitary engineering |
| Divisions: | x. Faculty of Engineering, Science and Mathematics > School of Civil Engineering and the Environment |
| Depositing User: | Ratna Sufiatin |
| Date Deposited: | 07 Jun 2016 07:29 |
| Last Modified: | 07 Jun 2016 07:29 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/3185 |
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