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对大面积水土保持治理措施的保存面积进行核实是分析计算水土保持减水减沙效益的基础。笔者通过应用土地详查成果，对黄河中游黄土丘陵沟壑区的晋西北１４县及黄土高原沟壑区的陇东８县（市）进行了梯田、坝地，造林、种草措施保存面积的核实，得出了黄河中游两个不同类型区的大面积各项水土保持治理措施的保存率，并用晋西典型调查进行验证，为黄河中游地区水土保持措施减水减沙效益的研究提供了可靠的基本数据。
To verify the conservation area of large-scale soil and water conservation measures is the basis for analyzing and calculating the benefits of water and sediment reduction by soil and water conservation. Through the application of detailed land survey results, the author verified the conserved area of terraces, dams, afforestation and grass planting in 14 counties in northwestern Shanxi Province in the loess hilly and gully regions of the middle reaches of the Yellow River and Longdong 8 counties (cities) in the gully region of the Loess Plateau. The conservation rates of various soil and water conservation measures in two different areas of the middle reaches of the Yellow River have been obtained and validated by the typical survey in western Shanxi so as to provide a reliable basis for the study on the benefits of water and sediment reduction by soil and water conservation measures in the middle reaches of the Yellow River data.