RWEQ: improved wind erosion technology.
RWEQ: improved wind erosion technology.
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DOI：
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发表时间：
2000-04
影响因子：
3.9
通讯作者：
D. Fryrear;J. D. Bilbro;A. Saleh;H. Schomberg;J. Stout;T. Zobeck
中科院分区：
文献类型：
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作者：
D. Fryrear;J. D. Bilbro;A. Saleh;H. Schomberg;J. Stout;T. Zobeck
摘要：改进的风蚀模型（RWEQ）已开发和验证的现场侵蚀数据从45个网站年。在RWEQ中，残留物，土壤可蚀性和土壤粗糙度参数表示为系数。在RWEQ计算机程序中，表面残留物随天气条件分解。残留物被掩埋或随耕作作业而被压平。土壤粗糙度随耕作方式的改变而改变，随降雨量、灌溉量和暴雨侵蚀力的增加而衰减。风障的作用用光密度指数来描述，但下风向的保护区取决于风速和土壤表面条件。对法案上的风速进行了修改，并将其影响纳入土壤流失估计中。土壤流失数据收集的网站，年降雨量为191至1255毫米。土壤砂粒含量变化从10%到87%。大多数侵蚀数据来自2.6公顷的圆形田地，但数据是从52公顷的圆形田地和36至128公顷的矩形田地收集的。测得的土壤流失量从0到31.21公斤平方米，估计土壤流失与RWEQ为相同的网站从0到39.15公斤平方米。测量值与估计值之间的统计相关性显著。RWEQ已经在广泛的土壤、气候和作物条件下进行了测试，但可能需要在非矿物质土壤上进行额外的测试。
ABSTRACT: An improved wind erosion model (RWEQ) has been developed and validated with field erosion data from 45 site years. In RWEQ, the residue, soil erodibility, and soil roughness parameters are represented as coefficients. Within the RWEQ computer program, surface residues are decomposed with weather conditions. Residues are buried or flattened with tillage operations. Soil roughness is modified with tillage implements and roughness decayed with rainfall or irrigation amount and storm erosivity. Effect of wind barriers is described with an optical density index,but the protected zone downwind is dependent on wind velocity and soil surface conditions. Wind speed over bills is modified and the effect is included in soil loss estimates. Soil loss data were collected from sites with an annual range of rainfall of 191 to 1255 mm. Soil sand contents varied from 10 to 87%. The majority of the erosion data are from circular fields 2.6 ha in size, but data were aho collected from a 52 ha circle and rectangular fields 36 to 128 ha. Measured soil losses varied from 0 to 31.21 kg m2 and estimated soil losses with RWEQ for the same sites varied from 0 to 39.15 kg M2. Statistical correlation between measured and estimated values was significant. RWEQ has been tested on a broad range of soil, climate, and crop conditions, but additional testing may be needed on non mineral soils.