河龙区间晋西北地区水保措施核实率的调查与计算

Check on Soil and Water Conservation Measures in Region of Helong Reaches of Yellow River in Northwestern Region of Shanxi Province

采用二阶等距抽样调查法，对河龙区间晋西北地区８ 条一级入黄支流水土保持措施的保存情况进行了详细调查和核实，结合１９９６年各县土地面积变更调查资料，分析确定了各流域的水土保持措施的核实率，为正确计算各流域的水土保持措施有效保存面积及减洪减沙效益打下了良好的基础。

The preservation of measures of soil and water conservation in 8 reaches of the Yellow River from Hekou to Longmen has been checked by means of sampling.The check ratio of the measures has also been determined with the new land area data of the counties in 1996. These made a good foundation for the preservation ratio check and calculation of the benefit of the flood and sediment absorption.