PENGEMBANGAN KAWASAN BUDIDAYA RUMPUT LAUT BERBASIS ANALISA KESESUAIAN LAHAN DI PERAIRAN NURUWE

The Nuruwe waters are oceanic waters with a considerable amount of fisheries resources and a potential for tourism in natural and aquaculture tourism. This research aimed to analyze the characteristics of the physical and chemical parameters as a limiting factor for the site selection of seaweed cultivation in Nuruwe waters and analyze land suitability of seaweed cultivation based on its criteria and determine the area of cultivation. A random sampling technique was applied to the data collection of marine environmental parameters. Data were analyzed using a spatial analysis with GIS techniques and carrying capacity analysis. The spatial analysis was used to determine the land suitability of seaweed cultivation based on the site selection criteria. The results showed that water quality parameters were suitable to support seaweed cultivation with the longline system. The effective area is ± 10 ha, with the number of longlines that can be placed as many as 20 units. ABSTRAK Perairan Nuruwe merupakan perairan oseanis dan juga perairan dengan potensi perikanan yang cukup melimpah serta terdapat potensi wisata baik dalam wisata alam maupun wisata budidaya. Tujuan dari penelitian ini adalah 1) menganalisis karakteristik parameter fisika-kimia sebagai faktor pembatas kesesuaian lokasi budidaya rumput laut di perairan Nuruwe, serta 2) menganalisis kesesuaian lahan budidaya rumput laut berdasarkan kriteria kesesuaian lahan dan menentukan luasan lahan budidaya. Metode pengambilan data parameter lingkungan perairan dengan teknik random sampling. Analisis data yang digunakan adalah analisis spasial untuk menentukan kesesuaian lahan menggunakan GIS berdasarkan kriteria kelayakan budidaya rumput laut dan analisis daya dukung. Berdasarkan hasil penelitian diperoleh parameter kualitas air yang diukur layak atau sesuai untuk mendukung kegiatan budidaya sistem longline di perairan Nuruwe. Kesesuaian lahan budidaya rumput laut dengan sistem longline di perairan Nuruwe tergolong sesuai (S2). Luasan lahan yang efektif sebesar ± 10 ha dengan jumlah sebanyak 20 unit longline.  Kata Kunci: Kesesuaian lahan, budidaya, daya dukung, rumput laut, perairan Nuruw

Field Micrometeorological Measurements, Process-Level Studies and Modeling of Methane and Carbon Dioxide Fluxes in a Boreal Wetland Ecosystem

The main instrumentation platform consisted of eddy correlation sensors mounted on a scaffold tower at a height of 4.2 m above the peat surface. The sensors were attached to a boom assembly which could be rotated into the prevailing winds. The boom assembly was mounted on a movable sled which, when extended, allowed sensors to be up to 2 m away from the scaffolding structure to minimize flow distortion. When retracted, the sensors could easily be installed, serviced or rotated. An electronic level with linear actuators allowed the sensors to be remotely levelled once the sled was extended. Two instrument arrays were installed. A primary (fast-response) array consisted of a three-dimensional sonic anemometer, a methane sensor (tunable diode laser spectrometer), a carbon dioxide/water vapor sensor, a fine wire thermocouple and a backup one-dimensional sonic anemometer. The secondary array consisted of a one-dimensional sonic anemometer, a fine wire thermocouple and a Krypton hygrometer. Descriptions of these sensors may be found in other reports (e.g., Verma; Suyker and Verma). Slow-response sensors provided supporting measurements including mean air temperature and humidity, mean horizontal windspeed and direction, incoming and reflected solar radiation, net radiation, incoming and reflected photosynthetically active radiation (PAR), soil heat flux, peat temperature, water-table elevation and precipitation. A data acquisition system (consisting of an IBM compatible microcomputer, amplifiers and a 16 bit analog-to-digital converter), housed in a small trailer, was used to record the fast response signals. These signals were low-pass filtered (using 8-pole Butterworth active filters with a 12.5 Hz cutoff frequency) and sampled at 25 Hz. Slow-response signals were sampled every 5 s using a network of CR21X (Campbell Scientific, Inc., Logan Utah) data loggers installed in the fen. All signals were averaged over 30-minute periods (runs)

Economic Impact of Gulf of Mexico Ecosystem Goods and Services and Integration Into Restoration Decision-Making

Sustainability of natural resources requires balancing exploitation and conservation, enabled by management based on the best available scientific and economic information. Valuation of ecosystem goods and services is an important tool for prioritizing restoration efforts, recognizing the economic importance of conserving natural capital, and raising public awareness about the contribution of healthy ecosystems to social welfare, now and for future generations. The Deepwater Horizon oil spill (DHOS) in 2010 was a Gulf of Mexico ecological and economic disaster adding to decades-long degradation of the region’s coastal and marine environment. In 2010, revenues from provisioning ecosystem goods and services generated by the five U.S. states bordering the Gulf of Mexico contributed over $2 trillion per year to the nation’s gross domestic product, including$660 billion from the coastal county revenues and $110 billion from ocean revenues. Mexico and Cuba contribute at least another$40 billion per year from their Gulf coastal and ocean economies. Total economic value of Gulf ecosystem goods and services also requires valuation of nonmarket regulating, cultural, and supporting services, which are far more difficult to assess, but add billions more dollars per year. In light of this total economic value and trends in ecosystem stressors, new investment is necessary to ensure completeness, accuracy, and availability of Gulf economic impact data. Civil and criminal settlements related to the DHOS provide unprecedented opportunities for improving integration of ecosystem goods and services into decisions that affect Gulf restoration and sustainability. This paper highlights the economic contributions of Gulf ecosystem goods and services to the nation’s welfare, and recommends actions and investments required to ensure that they are valued, and integrated into decision-making

Transformation Optics for Plasmonics

A new strategy to control the flow of surface plasmon polaritons at metallic surfaces is presented. It is based on the application of the concept of Transformation Optics to devise the optical parameters of the dielectric medium placed on top of the metal surface. We describe the general methodology for the design of Transformation-Optical devices for surface plasmons and analyze, for proof-of-principle purposes, three representative examples with different functionalities: a beam shifter, a cylindrical cloak and a ground-plane cloak.Comment: 15 pages, 3 figure

Assessing the Impact of the Concrete Canoe and Steel Bridge Competitions on Civil Engineering Technology Students

The new accreditation criteria (TC2K) of the Technology Accreditation Commission of ABET require an assessment of Program Intended Learning Outcomes. Some of the learning outcomes required by the “a” through “k” and the Civil criteria of TC2K include leadership skills, teamwork skills, project management skills, communication skills, and design and construction skills. The American Society of Civil Engineers (ASCE) and the American Institute for Steel Construction (AISC) sponsors regional and national concrete canoe and steel bridge competitions on an annual basis. The Civil Engineering Technology (CET) students at the Rochester Institute of Technology (RIT) have participated in these competitions for the past nine years. These competitions give students a chance to apply what they have learned in the classroom. To assess the impact of the concrete canoe and steel bridge competitions on student learning and development, the authors carried out a survey of current students and graduates of the CET program at RIT who have been members of the concrete canoe and steel bridge teams. The issues addressed in our survey include the following: impact of these activities on leadership skills, communication skills, teamwork skills, design and construction skills, project management skills, confidence levels, students’ enthusiasm for the profession, and a positive image and exposure for students and CET programs. In this paper, we discuss the results of this survey and some of the challenges to student participation in these non-credit activities at RIT, and present some suggestions for enhancing the level of student participation