Elise Bekele

CSIRO Land and Water

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Co-Authors

S. Toze

University of Queensland

Joanne Vanderzalm

Commonwealth Scientific and Industrial Research Organisation

Bradley M. Patterson

University of Western Australia

Peter Dillon

Commonwealth Scientific and Industrial Research Organisation

Simon Higginson

Water Corporation of Western Australia (Australia)

Declan Page

Commonwealth Scientific and Industrial Research Organisation

Konrad Miotliński

Edith Cowan University

Karsten Michael

Commonwealth Scientific and Industrial Research Organisation

Sunil Varma

Imperial College London

Don McFarlane

University of Western Australia

Cooperative Institutions

Commonwealth Scientific and Industrial Research Organisation

CSIRO Land and Water

Health Sciences and Nutrition

Australian Resources Research Centre

University of Western Australia

Curtin University

CO2CRC

University of Queensland

Canadian Food Inspection Agency

National Centre for Groundwater Research and Training

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Abstract: Can Geostatistical Methods be Used to Infer Long-Range Oil Migration Through Carrier Beds? A Case Study from the Alberta Basin, Canada

AAPG Bulletin (1998)

Elise Bekele

10.1306/00aa80ee-1730-11d7-8645000102c1865d

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Citations (0)

Stimulating smallholder tree planting – lessons from Africa and Asia

Unasylva (2007)

A.A. Nawir H. Kassa Mats Sandewall D. Dore Bruce M. Campbell

rom 1990 to 2005 the area of tropi- cal forest plantations increased from 69 million to 93 million hec- tares (FAO, 2006). Although plantations account for 11 percent of the total forest CTGCKP�#UKCCPFVJG�2CEK�ECPFQPN(� 2 percent in Africa, the two regions share a trend towards increased involvement of the private sector and small-scale producers in plantation establishment, which previously was primarily govern- ment controlled (Persson, 2003; Sam and Trung, 2001). Small-scale forest plantations provide a range of benefits to rural communities, including fuelwood, fodder and wood for building and everyday uses, as well as environmental and amenity benefits. Yet small-scale producers and poor households still reap only a small portion of the commercial benefits from plantation-derived wood and processed wood products, even though plantations in developing countries produce billions of dollars worth of these products annually. This article describes some different schemes through which smallholders participate in establishing and managing productive plantations. These reflect a continuum from by tree growers themselves to private corporate initiatives, with government-initiated collaborative in between. For each of these schemes, the article identifies key incentives - defined as payments or services that increase the comparative advantage of forest plan- tations over other land use options and thus stimulate investments in planta- tion establishment and management (Enters, Durst and Brown, 2003) - that can promote smallholder involvement in tree planting, although the strategies of course vary according to the country and the local conditions. The article highlights the importance of supportive policies and legislation, and clear, secure forest land tenure and rights as enabling conditions for sustainable smallholder tree growing.

Amenity

Tree planting

Community forestry

Reforestation

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Citations (42)

Determining requirements for managed aquifer recharge in Western Australia: progress report.

Alison Browne Elise Bekele S. Toze Simon Higginson Bradley M. Patterson

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Citations (3)

Evaluating two infiltration gallery designs for managed aquifer recharge using secondary treated wastewater

Journal of Environmental Management (2013)

Elise Bekele S. Toze Bradley M. Patterson Wolfgang Fegg Mark Shackleton

Infiltration (HVAC)

10.1016/j.jenvman.2012.12.018

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Citations (30)

Tracking NSZD mass removal rates over decades: Site-wide and local scale assessment of mass removal at a legacy petroleum site

Journal of Contaminant Hydrology (2022)

G.B. Davis John L. Rayner Michael J. Donn C.D. Johnston R. Lukatelich

Long-term estimates of natural source zone depletion (NSZD) rates for petroleum LNAPL (light non-aqueous phase liquid) sites are not available. One-off measurements are often thought valid over the lifetime of LNAPL sites. In the context of site-wide LNAPL mass estimates, we report site-specific gasoline and diesel NSZD rates spanning 21-26 years. Using depth profiles of soil gases (oxygen, carbon dioxide, methane, volatiles) above LNAPL, NSZD rates were estimated in 1994, 2006 and 2020 for diesel and 1999, 2009 and 2020 for gasoline. Each date also had soil-core mass estimates, which together with NSZD rates allow estimation of the longevity for LNAPL presence. Site-wide coring (in 1992, 2002, 2007) estimated LNAPL mass reductions of 12,000 t. For diesel NSZD, the ratio of NSZD rates for 2006 (16,000-49,000 L/ha/y) to those in 2020 (2600-14,000 L/ha/y) was ~3-6. By 2020, the 1994 diesel NSZD rates would have predicted the entire removal of measured mass (16-42 kg/m2). For gasoline, NSZD rates in 1999 were extremely high (50,000-270,000 L/ha/y) but 9-27 times lower (5800-10,000 L/ha/y) a decade later. The gasoline NSZD rates in 1999 predicted near complete mass removal in 2-12 years, but 10-11 kg/m2 was measured 10 and 21 years later which is 26% of the initial mass in 1999. The outcomes substantiate the need to understand NSZD rate changes over the lifetime of LNAPL-impacted sites.

10.1016/j.jconhyd.2022.104007

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Citations (16)

Aquifer residence times for recycled water estimated using chemical tracers and the propagation of temperature signals at a managed aquifer recharge site in Australia

Hydrogeology Journal (2014)

Elise Bekele Bradley M. Patterson S. Toze Andrew J.S. Furness Simon Higginson

TRACER

10.1007/s10040-014-1142-0

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Citations (28)

Lice Infestation On Cattle In Endegagn District, Southern Ethiopia: Species Composition, Prevalence And Seasonal Pattern

Bulletin of Animal Health and Production in Africa (2009)

Bersissa Kumsa Elise Bekele

Une étude a été conduite pour déterminer la composition, la prévalence et le type saisonnier des poux de bovins dans le district d’Endegagn au sud-ouest de l’Ethiopie. Au total, 500 bovins ont systématiquement été examinés selon les pratiques d’usage pendant la période allant de septembre 2005 à juin 2006. L’étude a révélé que sur un total de 500bovins examinés, 157 (31,4%) étaient infestés par une espèce de pou ou plus. On a pu observer quatre espèces de pou sur les bovins dans le district couvert par l’étude avec un taux de prévalence globale de 23,6% (pour Linognathus vituli) ; 5,4% (Damalina bovis) ; 2,6% (Solonopotes capillatus) et 1,8% (Haematopinus eurysternus). La prévalence mensuelle et la prévalence globale de l’infestation par les poux étaient beaucoup plus élevés (P

10.4314/bahpa.v56i3.43285

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Citations (5)

Fluid pressure implications of erosional unloading,basin hydrodynamics and glaciation in the Alberta Basin, Western Canada

Journal of Geochemical Exploration (2003)

Elise Bekele Benjamin J. Rostron Mark Person

Fluid pressure

Post-glacial rebound

10.1016/s0375-6742(03)00148-1

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Citations (21)

An Overpressure Case History Using a Novel Risk-Analysis Process

All Days (2001)

Kevin Dodds Alistair Fletcher A. Hennig Elise Bekele Michael P. Johnson

Abstract The economic consequence of exploitation in areas with an unspecified risk of abnormal pressure profiles range from increased drilling costs to unrealized prospect potential. Optimised planning practices will impact not only the costs of drilling but also the quality of the reservoir evaluation and productivity assessment. Numerous exploratory wells in the Carnarvon Basin have encountered unprognosed high pore pressures in the past resulting in increased concerns about well control and safety, and as a consequence higher drilling costs. As a result of the diversity of potential overpressure mechanisms, there is a variety of opinion on the risk of encountering abnormal pressure in particular areas, and no standard way to capture and incorporate this information into planning and drilling decisions. At the end of 1999 a project was defined to evaluate the risk of overpressure of a prospect. This project had the primary focus of evaluating the risk of encountering high pore pressures when drilling an exploratory well. This risk assessment was directed towards a decision point for well design, which had cost implications in anticipation of drilling. In the process of technical assessment of abnormal pressure in this prospect, it was important to include all of the necessary data and technical practices, which could contribute an understanding of the prediction. The application of a cooperative multi-functional team and a software infrastructure ("Juniper") was instrumental in allowing this process to take place. A visual decision tree with risk assessment allowed for input from all contributors and for the inter-relationship of the inputs. This comprised the methodology for assessment. The methodology highlighted, explicitly, areas of high uncertainty where evidence neither for nor against overpressure was available. These areas became the focus of technical work as they had potential for significant impact on the risk assessment. A sub-team extensively reviewed the pressure tests, sonic logs, borehole influxes and mud weights of nearby wells. The results of the well study had a bearing on the choice of analogue, the geological model, and pressure prediction. A geological modelling sub-process was carried out to test the significance of compaction disequilibrium, organic maturation and permeability on overpressure generation. A geophysical sub-process was initiated to complement the pressure modelling risk element. Surface seismic data was depth processed to relate velocities to trends obtained from the well study. The methodology was found to be a highly effective technique for recording the decision processes and as a tool for interdisciplinary communication in a cooperative and nonthreatening environment. The result of the study was to initially identify the critical risk areas and subsequently reduce the risk of overpressure in the prospect as perceived by all parties (geoscientists, drilling engineers, management and joint venture parties). The common view on risk prompted a reassessment of the risk profiles on all the related wells in the program and allowed revision of the drilling programs and significant cost savings relative to the original forecasts for the program.

Overpressure

Anticipation (artificial intelligence)

10.4043/13102-ms

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Citations (5)

Estimating Formation Water Salinity from Wireline Pressure Data: Case Study in the Vulcan Sub-Basin

Jim Underschultz Grant K. Ellis A. Hennig Elise Bekele Claus Otto

Wireline

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Citations (6)