Economic implications of brush treatments to improve water yield

ABSTRAKInformasi hasil air dari suatu ekosistem sangat penting dalam pengelolaan sumber daya air. Dalam perencanaan kegiatan konservasi sumber daya air, informasi sebaran spasial hasil air diperlukan untuk menentukan prioritas wilayah terkait dengan alokasi anggaran. Hasil air dari suatu ekosistem atau daerah aliran sungai (DAS) dapat diestimasi dengan menggunakan model hidrologi. Penelitian ini bertujuan untuk mendapatkan informasi tentang hasil air, baik besaran maupun sebaran spasialnya, dari daerah tangkapan air (DTA) Danau Rawa Pening. Hasil air dari lokasi penelitian dihitung dengan menggunakan model hasil air pada InVEST (the Integrated Valuation of Ecosystem Services and Tradeoffs), yang didasarkan pada pendekatan neraca air. Hasil perhitungan menunjukkan bahwa volume hasil air di DTA Danau Rawa Pening pada tahun 2015 adalah sekitar 337 juta m3. SubDAS Galeh, sebagai subDAS terluas, merupakan penghasil air terbesar (72,4 juta m3) diikuti oleh subDAS Sraten (66,8 juta m3) dan Parat (62,4 juta m3). Secara spasial, hasil air di lokasi kajian mempunyai nilai antara 0 hingga 29.634,19 m3/ha. Wilayah hulu dan tengah subDAS Sraten secara umum mempunyai hasil air yang lebih tinggi, sedangkan wilayah danau dan sekitarnya serta hulu subDAS Galeh mempunyai hasil air yang lebih rendah dibandingkan dengan wilayah lainnya. Wilayah dengan hasil air tinggi dapat diprioritaskan dalam kegiatan konservasi sumber daya air untuk mendukung pasokan air ke Danau Rawa Pening.Kata kunci: hasil air, daerah tangkapan air, model InVEST, Danau Rawa PeningABSTRACTAccurate information on water yield from an ecosystem is very important in the management of water resources. In the planning of water resources conservation activities, the information on the spatial distribution of water yield is needed to determine regional priorities related to budget allocations. The water yield from an ecosystem or watershed can be estimated using a hydrological model. This study aimed to obtain information about the water yield, both the magnitude and their spatial distribution, from the catchment areas of Lake Rawa Pening. The water yield from the study area was calculated using the water yield model in InVEST (the Integrated Valuation of Ecosystem Services and Tradeoffs), which based on the water balance approach. The results indicated that the volume of water yield in Lake Rawa Pening for 2015 is approximately 337 million m3. Galeh subwatershed, as the largest subwatershed, is the largest water producer (72.4 million m3), followed by Sraten subwatershed (66.8 million m3) and Parat subwatershed (62.4 million m3). Spatially, the water yield at the study site has a value between 0 to 29,634.19 m3/ha. Upstream and middle areas of Sraten subwatershed generally have higher water yield, while the lake and its surrounding areas as well as the upstream of Galeh subwatershed have lower water yield compared to other regions. The regions with high water yield can be prioritized in water resource conservation activities to support the supply of water to Lake Rawa Pening.Keywords: water yield, catchment areas, InVEST model, Lake Rawa Pening

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THE SOCIO-ECONOMIC AND CULTURAL IMPLICATIONS OF SKHOTHANE ON YOUTH’S (UNDER)DEVELOPMENT AT EKURHULENI’S TO WNSHIP(S) OF SOUTH AFRICA

Commonwealth Youth and Development ◽

10.25159/1727-7140/1143 ◽

2016 ◽

Vol 13 (2) ◽

pp. 1-19

Author(s):

Ndwakhulu Tshishonga

Keyword(s):

Young People ◽

Youth Culture ◽

Youth Unemployment ◽

Primary Data ◽

Culture Of Poverty ◽

Economic Implications ◽

Secondary Sources ◽

Cultural Implications ◽

Material Goods ◽

Ultimate Purpose

This article examines the socio-economic implications that the controversial sub-culture of skhothane has on the development or underdevelopment of youth at Ekurhuleni and surrounding townships. It interrogates skhothane within the post-modern expressive youth culture. In the township(s) of Ekurhuleni, skhothane is regarded not only as a controversial sub-culture but also as a lifestyle whereby young people compete in acquiring material goods with the ultimate purpose of destroying them. This practice co-exists alongside youth unemployment and underdevelopment which is exacerbated by poverty, rising unemployment and gross inequalities. The author argues that the practice of skhothane sub-culture does not only undermine the policies and programmes aimed at the socio-economic upliftment of young people, but turns the youth into materialistic consumers. In this article, young people are viewed as victims of post-modern lifestyles who are socialised under an intergenerational culture of poverty and underdevelopment. It uses primary data from selected interviews with skhothane members and general members of local communities and secondary sources from books, accredited journals and newspapers.

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An innovative prone positioning system for advanced deformity and frailty in complex spine surgery

Journal of Neurosurgery Spine ◽

10.3171/2019.7.spine19161 ◽

2020 ◽

Vol 32 (2) ◽

pp. 229-234

Author(s):

Benjamin Kolb ◽

John Large ◽

Stuart Watson ◽

Glyn Smurthwaite

Keyword(s):

Ankylosing Spondylitis ◽

Three Dimensional ◽

Technical Note ◽

Positioning System ◽

Prone Positioning ◽

Economic Implications ◽

Potential Safety ◽

Chest Deformity ◽

Positioning Device ◽

Skin Quality

The authors present a technical note for a prone positioning system developed to facilitate cervical extension osteotomy for ankylosing spondylitis in the presence of severe deformity and frailty. Chin-on-chest deformity represents one of the most debilitating changes of ankylosing spondylitis. Where the chin-brow angle approaches or exceeds 90°, prone positioning becomes problematic due to the fixed position of the head. Furthermore, the challenge is compounded where physiological deconditioning leads to frailty, and the side effects of medical therapies decrease muscle mass and skin quality. Conventional prone positioning equipment is not able to cater to all patients. A versatile system was developed using a 3D reconstruction to enable a positioning simulation and verification tool. The tool was used to comprehensively plan the perioperative episode, including spatial orientation and associated equipment. Three-dimensional printing was used to manufacture a bespoke positioning device that precisely matched the contours of the patient, reducing contact pressure and risk of skin injury. The authors were able to safely facilitate surgery for a patient whose deformity and frailty may otherwise have precluded this possibility. The system has potential safety and economic implications that may be of significant utility to other institutions engaging in complex spinal surgery.

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