THE INFLUENCE OF THE THICKNESS OF SAND MEDIA AND THE DENSITY OF TYPHA ANGUSTIFOLIA L PLANT AGAINST THE REMOVAL OF COD CONTENT OF WASTE LEACHATE POLLUTANTS ON CONSTRUCTED WETLANDS

Sugeng Nuradji¹ , Sutrisno Anggoro², Henna Rya Abdurachim³  and Boedi Hendrarto⁴

^*Doctoral Program in Environmental Sciences of Diponegoro University Semarang

¹ Health Polytechnic-Ministry of Health Palu, Central Sulawesi, Indonesia

²Doctoral Study Program in Coastal Resources Management of Diponegoro University Semarang

³Medical Faculty, Diponegoro University Semarang

⁴Fisheries and Marine Sciences Faculty of Diponegoro University Semarang

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ABSTRACT

One of the efforts to reduce the negative impact of leachate waste in the environment uses adaptive plants with waste in constructed wetlands (CWs), because the method does not require high operating costs and environmentally friendly.The purpose of this study is to examine the influence of the thickness of sand media and the density of Typha angustifolia L against the COD content of waste leachate pollutants removal efficiency in CWs. This research method uses a split plot design at laboratory scale. A statistical test uses linear additive of variance analysis for a randomized group with two factors and one dependent variable. The results of the study of the average influent COD content at the level of between 495.5 mg/L to 598.56 mg/L after experiencing sequential time (7, 9, 11 and 13) days in CWs decrease to 21.83 mg/L to 68.74 mg/L. There is not a significantly (p = 0.158 > 0.05) influence the thickness of sand media to the COD removal. The COD removal efficiency is significantly (p = 0.00 < 0.05) influenced by the density of Typha angustifolia L plant.  The highest removal efficiency is selected on density 36 plants/m2, occurring in the thickness of sand media of 55 cm with the removal at the level of between 88.99 % to 95.96 %.

Keywords: constructed wetlands, leachate, COD, sand media, T.angustifolia L. 

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DEGRADED LANDS MAPPING, MODELLING AND PLANNING IN KABUPATEN LIMA PULUH KOTA

Trinovita Zuhara Jingga¹, Arnayulis², M.Amrizal¹, Yuhendra³ and Gunadi Widi Nur Cahyo⁴

¹JurusanTeknologi Pertanian Politeknik Pertanian Negeri Payakumbuh Kabupaten Lima Puluh Kota, Indonesia

²Jurusan Budidaya Tanaman Pangan Politeknik Pertanian Negeri Payakumbuh Kabupaten Lima Puluh Kota, Indonesia

³FakultasTeknik Informatika Institut Teknologi Padang Padang, Indonesia ⁴Fakultas Ilmu Komputer Universitas Putra Indonesia “YPTK” Padang, Indonesia

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ABSTRACT

Degraded lands is one of many problems in agriculture development in Indonesia. Kabupaten Lima Puluh Kota is a district in West Sumatera Province that still have large areas of degraded lands, and in this study, these degraded lands will be used as sample. One of the causes of the emergence or existence of degraded lands is the practicing of land management that is not environmental-safe. The environmental-unsafe land management includes, uncontrolled traditional farming methods, long dry season or the absence of proper irrigation. The main goal of this study is to find real condition in surveillance area and to map degraded lands in Kabupaten Lima Puluh Kota, data modelling plan to know the level of its criticality which identify by aerial imagery, and potentials of surrounding areas. By modelling these data, we can develop several strategies that can be used to change the status of the lands from degraded to productive.

Keywords : Degraded land, Aerial Surveillance 

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MODEL OF CONTROLLING INTANGIBLE ASSETS IN SECONDARY IRRIGATION SYSTEM MANAGEMENT

Nugroho Tri Waskitho¹ and Djudiah²

¹Faculty of Agriculture and Animal Husbandry, University of Muhammadiyah Malang, Jl. Raya Tlogomas 246, Malang 65144

²Faculty of Phsychology, University of Muhammadiyah Malang, Jl. Raya Tlogomas 246, Malang 65144

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ABSTRACT

The research aimed at developing model of controlling intangible assets in secondary irrigation management. The research method consisted of two stages. The first stage was building the model of controlling intangible assets in irrigation management using neuro-fuzzy. The model had three submodels: knowledge management, intangible assets, and performance of irrigation system. The second stage was evaluating the model in Molek irrigation system in Malang, East Java. Data collecting was done by questionnaire and interview on employees of Irrigation Office in Kepanjen, Malang, East Java, Indonesia. Data analysis was done by Adaptive Neuro Fuzzy Inference System. The model had been evaluated by correlation coefficient, Mean Absolute Percentage Error and Root Mean Square Error. The research result indicated that the model of controlling intangible assets in irrigation system management could predict intangible assets and performance of irrigation system well. The model linked knowledge management, intangible assets and performance of irrigation system. Knowledge management felt into four main components: (i) learning organization, (ii) principle of organization, (iii) policy and strategy, and (iv) information and communication technology which controlling intangible assets in irrigation system. Intangible assets consisted of moral intelligence, emotional intelligence, creativity attitude, and institutional culture which controlling effectiveness of irrigation.

Keywords: model, intangible assets, controlling, secondary irrigation system

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ASSESSMENT EROSION 3D HAZARD WITH USLE AND SURFER TOOL IN PASAMAN WATERSHED, SUMATRA ISLAND-INDONESIA

Aflizar, Roni Afrizal and Edi Syafri Muzakkir

State Polytechnic Payakumbuh for Agriculture,Payakumbuh 26271, Indonesia. Fax :62-752-7750220,

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ABSTRACT

Quantification of soil erosion rate is an important basic to investigate and improve land use system in Indonesia which has not been sufficiently conducted. In this study, we have tried to clarify spatial distribution of 3D soil erosion and dominant erosion factor controlling loss or redistribution of soil sediment in order to efficiently discuss the sustainable management of Pasaman watershed where is a main palm oil plantation producing area in Sumatra Island. The Universal Soil Loss Equation (USLE) and Erosion Three Dimension (E3D) in Surfer tool were used to identify characteristic of dominant factor in Pasaman Watershed using data soil survey and watershed characteristic. Soil erosion in Pasaman watershed is affected by topography (LS) factor and soil erodibility (K) factor in long-term period. At present, erosion is accelerated by change in cover crop (C) factor, soil conservation practices (P) factor and high rainfall erosivity (R). Estimated soil erosion rate was generally higher in upper than in lower topographical positions. It possibly enhanced the redistribution of soil, especially fine soil particles, and might contribute to degraded water quality at river and sea water as outlet of Pasaman watershed. Annual average soil erosion for Pasaman watershed was 427.23 ton/ha/y in 2014 where exceed tolerable erosion 35,47 ton/ha/y. Average concentrations of PO4-P and NO3-N in sea water in the outlet of Pasaman Watershed ranged from 0.05-1.88 mg/L and 0-2.90 mg/L from 2014, respectively. PO4-P exceeded level standard by Indonesia. Natural factor, including heavy rainfall, local soil properties and land use change in a landscape susceptible to soil erosion were the fundamental factor responsible for the high soil erosion in the watershed. The USLE model in Surfer tool was used to identify specific region susceptible to soil erosion by water and was also applied to identify suitable sites to conduct soil conservation and agroecological land use planning in Pasaman watershed.

Keywords: Erosion 3D, Pasaman watershed, Palm Oil Plantation, USLE

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