• Utilization of Palm-mat Geotextiles to Conserve Agricultural Soils.

      Bhattacharyya, Ranjan; Davies, Kathleen; Fullen, Michael A.; Booth, Colin A. (International Erosion Control Association (IECA), 2009)
      Previously, most studies on the effectiveness of geotextiles on soil erosion rates and processes were conducted in laboratory experiments for <1 h. Hence, at Hilton (52o33' N, 2o19' W), East Shropshire, UK, we investigated the effectiveness of employing palm-mat geotextiles (Borassus and Buriti mats) to reduce rainsplash erosion, runoff and soil loss under field conditions. This study is a component of the European Union-funded BORASSUS Project. The effects of Borassus mats on rainsplash erosion were studied for ~2 years (2002-2004), and re-established in January 2007 on a 0o slope. There were 12 experimental plots (six plots completely-covered with mats and six bare plots; each measuring 1.0 x 1.0 m). Runoff-plot studies were also conducted on the loamy sand soil at Hilton for 2 years (2002-2004) with duplicate treatments: (i) bare soil; (ii) grassed, (iii) bare soil with 1 m Borassus-mat buffer zones at the lower end of the plots and (iv) completely-covered with Borassus-mats. Each plot was 10 x 1 m on a 15o (26.6%) slope. To confirm the results, another set of experiments have been in progress at Hilton since January 2007, with one additional treatment (bare soil with 1 m Buriti-mat buffer zones) compared with the earlier experiment. Runoff and soil erosion were collected from each plot in a concrete gutter, leading to a 0.02 m3 (20 liters) capacity receptacle placed inside a 0.14 m3 (140 liters) capacity container. Results (06/10/02-02/09/04; total precipitation = 1038.3 mm) showed Borassus mats on bare soil reduced total rainsplash erosion by ~50% compared with bare plots (9.64 kg m-2; 1.97 lb ft-2). The use of Borassus mats on bare soil (during 01/22/07-01/21/08; total precipitation = 919.2 mm) also reduced soil splash erosion by ~90%. During 03/25/02-05/10/04 (total precipitation = 1319.8 mm) complete cover of Borassus mats on bare soil reduced total runoff by ~19% and soil erosion by ~64%. Furthermore, Borassus mats as 1 m buffer strips on bare soil reduced runoff by ~36% and soil erosion by ~57%. During 01/08/07-01/14/08 (total precipitation = 923.4 mm), plots with Borassus and Buriti mats as buffer strips on bare soil reduced sediment yield by ~93 and 98%, respectively, and runoff by ~83 and 63%, respectively. Buffer strips of Borassus mats were also as effective as complete cover of the same mats. Thus, utilization of palm-mat geotextiles as buffer strips on bare plots (area coverage ~10%) is highly effective for soil and water conservation.
    • Verifying safety policies with size properties and alias controls

      Chin, Wei-Ngan; Khoo, Siau-Cheng; Qin, Shengchao; Popeea, Corneliu; Nguyen, Huu Hai (2013-07-01)
    • We have eyes as well as ears: experimental music and the visual arts

      Ryan, David; Anglia Ruskin University (Ashgate Academic Press, 2009-09)
      This chapter deals with the relationship, influence, and reciprocal nature, of the visual arts and experimental music. While it connects with contemporary practices, it also attempts to trace certain historical threads back to Cage, the abstract expressionist painters and the discourses evolving from these. It looks at dominant ideas emanating from modernist notions – firstly formalist and media specific ideas and then conceptual and environmental influences. It argues that visual art’s evolving open space of discourse has allowed a platform for experimental music that traditional musical contexts have denied.