Article Per Year (5 Year)
p-Index From 2020 - 2025
0.444
P-Index
This Author published in this journals
All Journal Warta Rimba Jurnal Penelitian Ekosistem Dipterokarpa Forest and Society Jurnal Teknologi Lingkungan UNMUL
Sigit Hardwinarto, Sigit
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Education Engineering Environmental Science Social Sciences Other

Published : 4 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 4 Documents
Search

 1 
IDENTIFIKASI POHON INANG EPIFIT DI HUTAN BEKAS TEBANGAN PADA DATARAN RENDAH DAERAH ALIRAN SUNGAI (DAS) MALINAU Sujalu, Akas Pinaringan; Hardwinarto, Sigit; Boer, Chandradewana; Sumaryono, Sumaryono
Jurnal Penelitian Ekosistem Dipterokarpa Vol 1, No 1 (2015): Jurnal Penelitian Ekosistem Dipterokarpa
Publisher : Balai Besar Penelitian dan Pengembangan Ekosistem Hutan Dipterokarpa

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Penelitian ini bertujuan untuk mengidentifikasi pohon inang epifit (porofit) pada hutan bekas tebangan setelah 6 tahun pembalakan seluas 12 hektar di Hutan Penelitian Malinau (MRF-CIFOR) pada hutan dataran rendah DAS Malinau.  Pohon inang epifit di hutan bekas tebangan ditemukan 50 pohon per hektar, yang terdiri dari 162 spesies dalam 42 suku dengan 484 pohon (79.9%) berdiameter 20-51 cm.  Pohon inang dari family Dipterokarpa di temukan paling banyak di hutan bekas tebangan (± 50%). Shorea parvifolia Dyer. merupakan pohon inang paling banyak ditemukan (34 pohon).
CURAHAN TAJUK PADA TEGAKAN MODEL ARSITEKTUR POHON AUBREVILLE, LEEUWENBERG DAN STONE DI TIPE PENGGUNAAN LAHAN KEBUN HUTAN SUB DAERAH ALIRAN SUNGAI GUMBASA Naharuddin, Naharuddin; Bratawinata, Ariffien; Hardwinarto, Sigit; Pitopang, Ramadanil
Jurnal Warta Rimba Vol 4, No 1 (2016)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (651.507 KB)

Abstract

Throughfall is part of the rainwater that falls onto the surface of the soil through the cracks and the canopy or in the form of runoff from the leaves, twigs or branches. This study aims to determine the effect of rainfall on the stand throughfall Aubreville architecture models, Leeuwenberg and Stone. To calculate the amount of throughfall measurements directly on three models of tree architecture Aubreville, Leeuwenberg and Stone each repeated 3 times measured for 30 times the rainfall event. The results showed the highest throughfall Aubreville models by 18.74% and the smallest model of Stone 12.36% of the total rainfall 413.60 mm. Relations with throughfall precipitation is 75% in model Aubreville, 36% and 43% models Leeuwenberg Stone models.Keywords: Throughfall, stem flow, architecture model, watershed
Poor science meets political neglect: Land use changes of high conservation value forests in Indonesia Nurprabowo, Arnanto; Awang, San Afri; Hardwinarto, Sigit; Dharmawan, Budi; Daulay, Muhammad Haidar; Maryudi, Ahmad
Forest and Society Vol. 5 No. 2 (2021): NOVEMBER
Publisher : Forestry Faculty, Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24259/fs.v5i2.13451

Abstract

Forest land allocation and use in Indonesia have been politically contested and characterized by poor data and competing interests of different institutions. This study analyzes the process of integrating scientific findings in policymaking about land use and changes. The focus is on the processes related to the changes of Highly Important Forest Zones with Strategic Values (Dampak Penting Cakupan Luas dan bernilai Strategis/DPCLS). DPCLS forests are unique as any changes require approval from the parliament to complement the processes at the Ministry of Environment and Forestry and must be based on rigorous scientific evaluation. This study uses the case of Riau Islands (Kepri) Province, previously part of Riau Province, which to date is one of only two Indonesian provinces yet to accept the forest zonings of the Ministry. The province’s strategic positions as exclusive economic and free trade zones make it further interesting in terms of land allocation as land becomes increasingly valuable for other uses. This paper specifically asks how the scientific investigation on the potential land use changes were conducted, how reliable the discoveries are, and how they were utilized in multiple steps at different institutions from the proposal evaluations to the approval stages. Our research indicates that scientific findings have rarely been integrated in policy making regarding DPCLS forests in Kepri Province. In addition, the scientific findings are weak; the institution producing them is heavily dominated by government officials and paid consultants/ experts. The scientific body was only established to fulfill the formal processes required by the regulatory frameworks. Proposals and decisions on the changes of DPCLS forests in Kepri Province are more characterized by political considerations. The “scientific findings” of the current land use in Kepri Province is used as a political commodity (or commodities) to support the interests of actors.
POTENSI AIR BAWAH PERMUKAAN TANAH PADA AREAL PERKEBUNAN KELAPA SAWIT PT BUDIDUTA AGROMAKMUR DI KABUPATEN KUTAI KARTANEGARA Masau, Rio Apriliantus Dopo; Hardwinarto, Sigit; Sarminah, Sri
Jurnal Teknologi Lingkungan UNMUL Vol 8, No 2 (2024): Jurnal Teknologi Lingkungan UNMUL
Publisher : Mulawarman University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jtlunmul.v8i2.17612

Abstract

Usaha perkebunan kelapa sawit dapat memberikan berdampak positif terhadap perekonomian, juga dapat berdampak negatif terhadap lingkungan, khususnya terkait dengan fungsi hutan alam sebagai pengatur tata air serta penghasil air. Hal ini menyebbakan terjadinya defisit air khususnya pada saat musim kemarau. Tujuan penelitian ini adalah untuk mengetahui potensi air bawah permukaan tanah dari pengaruh kombinasi nilai laju infiltrasi, parameter sifat fisik tanah, dan kondisi vegetasi di areal perkebunan kelapa sawit PT Budiduta Agromakmur di Kabupaten Kutai Kartanegara. Pemilihan plot penelitian ini secara purposive sampling sebanyak 2 plot penelitian yakni umur tanaman 8 tahun dan 25 tahun dengan kemiringan lereng secara berurutan 20% dan 25%. Pengukuran laju infiltrasi pada kedua plot penelitian tersebut menggunakan alat double ring infiltrometer pada 3 lokasi pengukuran dengan 3 kali ulangan, serta pengambilan beberapa sampel tanah dengan ring sample pada kedalaman tanah 0 – 30 cm, sampel-sampel tanah ini diuji di laboratorium untuk mendapatkan nilai parameter sifat fisik tanah, dan pengamatan struktur tanah langsung di lapangan. Hasil penelitian ini menunjukkan bahwa potensi air bawah permukaan tanah diindikasikan oleh nilai kandungan air tanah rata-rata pada umur 8 tahun 29,30% dan 25 tahun 34,32%. Peningkatan nilai kandungan air tanah ini dipengaruhi oleh umur tanaman kelapa sawit semakin tua, laju infiltrasi menurun, kandungan fraksi pasir berkurang, fraksi lempung dan liat meningkat, porositas dan permeabilitas tanah menurun, bulk density meningkat, kondisi vegetasi tanaman kelapa sawit diameter batangnya menurun dan tutupan tumbuhan bawah semakin sedikit.
Co-Authors Ahmad Maryudi Akas Pinaringan Sujalu Bratawinata, Ariffien Budi Dharmawan Chandradewana Boer Daulay, Muhammad Haidar Masau, Rio Apriliantus Dopo Naharuddin Naharuddin Nurprabowo, Arnanto Ramadanil Pitopang San Afri Awang Sarminah, Sri Sumaryono Sumaryono