松散堆积物的来源有工程建设形成的废弃土方、工业生产废弃灰渣、居民生活垃圾、城市接纳的异地泥沙等。利用侵蚀形态量测、扦杆法及定点监测等方法对延安市松散堆积物侵蚀调查测算,发现其侵蚀强度大多在8 000～ 50 000t /km2· a之间,最大达13. 05× 104 t /km2· a,最小为4. 8× 103 t /km2· a。其中,以人为倾倒的弃土坡和堆土场边坡侵蚀最为严重。
粘土矿物广泛分布于原生沉积岩、三大岩类风化带及第四系松散堆积物构成的斜坡中。
Clay minerals distribute extensively in various slopes made of sedimentary rock, weathering profiles of igneous rock, metamorphic rock and sedimentary rock and colluvial deposits.
利用土壤普查和松散堆积物调查资料，对全县土壤和松散堆积物按成因类型和组成特征进行了面积统计。
Based on field survey data, an area, an area statistical analysis of soils and loose sediments for both of their genetic and compositional groups was made.
草原区的煤炭开采，大量的挖损和排土场岩土排弃占地面积大，人为堆垫的松散堆积物形成再塑地貌，破坏大面积草场原地貌环境，是新生水土流失的源地。
The area of mine exploitation and outer dump or digging are large in steppe, which destroyed many grassland resources and also formed lots of new soil and water losses.
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