Landslides are the second biggest natural disasters in Indonesia, occurring mostly in volcanic area with thick and clay rich soils. Examining the changes of land surface and soil morphology brought about by a particular landslide is usually the first step required for vegetative rehabilitation. Most examinations to date, however, have been based on general characters rather than on soil morphology, including physical and chemical characteristics of the soil, which are usually locally specific. This study investigates the morphological characteristics of soil in a landslide-prone slope region of Sumbing Volcano, in Central Java Province of Indonesia. The field investigations are conducted at three landslides sites. It starts with interpreting small format areal-photographs which have been geo-corrected, followed by the delineation of landslide zones (i.e. crowns, main scarps, heads, bodies and toes) based on morphological analysis of the landslide sites. Finally, identification of morphological, physical and chemical characteristics of the soil in each of the landslide zones are conducted in the field, along with laboratory tests. The results demonstrate that soil morphology is unique for each of the landslide zones. The characters of the undisturbed soil, as indicated by well-defined genetic horizons, are found in the crown zones. Outcrop of high clay content soil material layers are seen in the main scarp zones. Meanwhile pedoturbation processes are evident in the zone of bodies and toes, suggesting that the soil is prone for erosion. If natural erosions in these zones are not controlled and/or unmitigated, the situation will trigger landslide reactivations. We suggest that in studying landslide, one also considers the characters of soil morphology, as this additional information provides a more complete understanding of both land surface morphology and soil morphology to inform landslide vegetative rehabilitation.

中文翻译：

---

爪哇中部滑坡撞击的速伏火山的土壤形态特征分布-印度尼西亚

滑坡是印度尼西亚的第二大自然灾害，主要发生在火山地区，土壤厚而黏土丰富。检查特定滑坡带来的土地表面和土壤形态的变化通常是植物恢复的第一步。然而，迄今为止，大多数检查都是基于一般特征，而不是基于土壤形态，包括土壤的物理和化学特性，这些特性通常是局部特定的。这项研究调查了印度尼西亚中爪哇省Sumbing火山易发生滑坡的斜坡地区土壤的形态特征。实地调查是在三个滑坡现场进行的。首先要解释经过地理校正的小尺寸面像，然后根据滑坡部位的形态分析划定滑坡带（例如，树冠，主要山毛，头部，身体和脚趾）。最后，在野外进行每个滑坡带土壤形态，物理和化学特征的识别，并进行实验室测试。结果表明，每个滑坡带的土壤形态都是唯一的。在树冠区域发现了明确定义的遗传视野所指示的原状土壤的特征。在主要的陡峭带中可以看到高粘土含量的土壤物质层的露头。同时，在脚趾和身体区域明显出现了人为扰动的过程，这表明土壤很容易受到侵蚀。如果这些地区的自然侵蚀得不到控制和/或缓解，这种情况将触发滑坡复活。我们建议在研究滑坡时，还应考虑土壤形态的特征，因为这一额外的信息可以更全面地了解地表形态和土壤形态，从而为滑坡的植被恢复提供依据。