低立式格状土工沙障固沙效果研究

EFFECT OF UPRIGHT GEOTEXTILE CHECKERBOARD STABILIZING SAND

通过在乌兰布和沙漠东南缘,测定规格为1m×1m、孔隙度为15%、25%、35%的格状土工沙障的输沙量、降低风速比率和障内地表蚀积3个指标,综合分析土工沙障的固沙效果。结果表明,与对照相比,孔隙度为15%、25%、35%土工沙障内近地表0 cm^10 cm的相对含沙量分别降低14.99%、9.0%、14.5%;15%与25%、25%与35%孔隙度的土工沙障防风效应存在极显著差异,15%与35%的防风效应不显著;就防风效应而言,25%孔隙度沙障的防风效应最好,其次为15%,35%孔隙度沙障的防风效应最差;15%和35%孔隙度的沙障固沙稳定性存在显著差异,25%和35%孔隙度的固沙稳定性差异极显著,孔隙度25%和15%的土工沙障固沙稳定性差异不显著,25%与15%孔隙度的土工沙障固沙稳定性较35%的强。

This article measured three kind of porosity（15% ,25% ,35% ） geotextile Checkerboard of sand transport, ratio of reducing wind velocity and wind erosion loss three indicators, analyzed the effects of three kind of porosity upright geotextile checkerboard on stabilizing sand in the southeast edge of Ulan Buh Desert. Results showed that： compared with CK, relative sediment concentration on the near - surface 0cm - 10cm of 15% ,25% and 35% porosity of geotextile checkerboard reduced by 14.99%, 9.0%, 14.5% re- spectively; Windproof effect of 15% and 25% ,25% and 35 porosity existed a significant difference, the windproof effect of 15% and 35% porosity was not significant; 25% porosity was the best of three for windproof, followed by 15% porosity, the worst was 15% po- resity. Result of stability analysis showed that： the effect of 15% and 35% porosity were obvious, 25 % and 35% porosity existed a significant difference, the difference between 25% and 15% porosity was not significant, the Stability wind - sand fixation effect of 25% and 15% porosity were better than 35%.