ANNASTYO, ANUGRAH JATI (2024) BEBERAPA SIFAT FISIK TANAH PERTANIAN AKIBAT SEDIMENTASI AIR IRIGASI TERDAMPAK TAMBANG PASIR SUNGAI SENOWO KABUPATEN MAGELANG. Other thesis, UPN Veteran Yogyakarta.
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Abstract
iv
BEBERAPA SIFAT FISIK TANAH PERTANIAN AKIBAT
SEDIMENTASI AIR IRIGASI TERDAMPAK TAMBANG PASIR
SUNGAI SENOWO KABUPATEN MAGELANG
Oleh: Anugrah Jati Annastyo
Dibimbing oleh: Partoyo dan Dyah Arbiwati
ABSTRAK
Sungai Senowo terletak di sisi barat Gunung Merapi. Sungai ini melalui enam
wilayah desa yaitu Krinjing, Keningar, Sumber, Mangunsoka, Dukun, dan
Banyudono. Penambangan pasir di hulu Sungai Senowo menghasilkan sisa
pencucian pasir yang mengalir ke hilir, sebagian masuk ke lahan pertanian melalui
saluran irigasi. Tujuan penelitian ini untuk mengetahui beberapa sifat fisik tanah
pertanian akibat sedimentasi air irigasi Sungai Senowo. Penelitian dilaksanakan
dengan metode survei. Penentuan titik sampel dilakukan secara purposive
berdasarkan jarak petak lahan pertanian dari Sungai Senowo. Pengukuran sampel
air dilaksanakan di lapangan dengan mengukur TDS menggunakan TDS meter,
debit aliran menggunakan metode apung. Pengambilan sampel tanah dilakukan
sebanyak enam sampel tanah terusik dan enam sampel tanah tidak terusik
menggunakan ring sampler setiap titik sampling diambil sampel pada kedalaman 0-
5 cm, 5-10 cm, dan 10-20 cm. Sifat fisik tanah yang dianalisis di laboratorium
meliputi tekstur, BV, BJ, porositas tanah, permeabilitas, dan agihan ukuran pori.
Hasil penelitian menunjukkan nilai TDS air irigasi 163-190 ppm; debit aliran 0,1-
0,8 m3/s; tekstur tanah termasuk geluh pasiran dan geluh debuan; BV 1,24 – 1,63
g/cm3; BJ 2,4 – 2,76 g/cm3; porositas tanah 38% (jelek) – 53% (baik); permeabilitas
8,47-12,02 cm/jam (agak cepat); dan agihan pori tanah yaitu pori drainase cepat
15,98 - 35,07% (tinggi), pori drainase lambat 0,18% (sangat rendah) hingga 7,4 %
(rendah); dan pori air tersedia 0,9% (sangat rendah) hingga 25,55 % (sangat tinggi).
Kata kunci: sedimen, sifat fisik, Sungai Senowo, tambang pasir
v
THE SOIL PHYSICAL PROPERTIES OF AGRICULTURAL LAND DUE
TO SEDIMENTATION OF SENOWO RIVER IRRIGATION WATER
IMPACTED BY SAND MINING
IN MAGELANG REGENCY
By: Anugrah Jati Annastyo
Supervised by: Partoyo and Dyah Arbiwati
ABSTRACT
The Senowo River was situated on the west side of Mount Merapi. This river passes
through six village areas: Krinjing, Keningar, Sumber, Mangunsoka, Dukun, and
Banyudono. Sand mining at the upper stream of the Senowo River resulted in sand
washing residue flowing downstream, with some entering agricultural land through
irrigation channels. The objective of this study was to examine several physical
properties of agricultural soil due to irrigation water sedimentation from the
Senowo River. The research was conducted through a survey method. Sample
points were purposively selected based on the distance of agricultural plots from
the Senowo River. Water sample measurements were carried out in the fields,
measuring Total Dissolved Solids (TDS) using a TDS meter and flow rate using a
floating method. Soil samples were taken, consisted of six disturbed soil samples
and six undisturbed soil samples at the each sampling point, at depths of 0-5 cm, 5-
10 cm, and 10-20 cm. Physical soil properties analyzed in the laboratory included
texture, bulk density, particle density, soil porosity, permeability, and pore size
distribution. The research findings indicated TDS values of irrigation water is 163-
190 ppm; flow rates of 0,1-0,8 m3/s; soil textures categorized as sandy loam and silt
loam; bulk density ranging from 1,24 to 1,63 g/cm3; particle density ranging from
2,4 to 2,76 g/cm3; soil porosity ranging from 38% (poor) to 53% (good);
permeability ranging from 8,47 to 12,02 cm/h (moderately fast); and distribution of
soil pore sizes: fast drainage pores from 15,98% to 35,07% (high), slow drainage
pores from 0,18% (very low) to 7,4% (low), and available water pores from 0,9%
(very low) to 25,55% (very high).
Keywords: sedimentation, physical properties, Senowo River, sand mining
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | sedimentation, physical properties, Senowo River, sand mining |
| Subjects: | S Agriculture > S Agriculture (General) |
| Divisions: | Faculty of Medicine, Health and Life Sciences > School of Biological Sciences |
| Depositing User: | Eko Yuli |
| Date Deposited: | 29 Jul 2024 01:33 |
| Last Modified: | 29 Jul 2024 01:33 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/40481 |
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