The need for rice is certainly increasing along with the increase in the population of a region. Weninggalih is one of the villages in Bogor Regency where most of the land cover (63%) is rice fields. The land can only be harvested once a year. So that the area of ​​rice fields is not proportional to the results of rice production produced. These problems raise the interest of researchers in conducting land evaluation analysis on lowland rice plants. The data used comes from the results of data collection with observation techniques and literature study. The sample used was 35 units based on the matching analysis technique to produce an evaluation analysis of lowland rice plants. The matching results show that there are two land suitability classes including marginally suitable (S3) and not suitable (N). As much as 254.20 ha (82.17%) is a marginal suitability class (S3), while 55.20 ha (17.82%) is not suitable (N). The results of the analysis are limited by several factors, including water availability, drainage, soil CEC, base saturation, soil pH, organic C, total N, P2O5, K2O, slope, erosion hazard, inundation height, duration of inundation, and rocks on the surface. After making improvements to the actual land, 309.72 ha became a potential class with a very suitable land suitability class (S1).

Weninggalih Village is one of the villages that experiences repeated droughts every year and the conversion of land functions into built areas, this has an impact on the decline in village rice production. While most of the land cover in Weninggalih Village is rice fields. This study aims to determine the land conservation policy in Weninggalih Village, Jonggol District, Bogor Regency, and West Java. The survey method was used to collect data from the field. The sample was determined by proportional sampling as many as thirty farmer households. The Analytical Hierarchy Process method was used to determine the appropriate land conservation policy for farmer households in Weninggalih Village. Based on the results of the study, it is known that those that influence land conservation policies are education, farming experience, conservation attitudes, expansion education, and cost sharing. The land in Weninggalih Village requires land conservation considering that the physical condition of the village land tends to be dry, based on observations. Land conservation policy efforts can be used as material for consideration in planning appropriate land use.

Weninggalih village experiences drought that keeps recurring every year which has an impact on the people in the area. The purpose of this study was to determine the potential location for the construction of a reservoir to anticipate water crisis in Weninggalih Village, Jonggol Districts, Bogor Regency. The research method used is a survey method to determine the sampling location and quantitative methods are used for analysis. The field survey used a drones for aerial photo data recording. Sampling was determined purposively based on the Digital Elevation Model in three dimensions from the resulting aerial photos. Quantitative methods are used to determine the potential location of the reservoir. The results showed that there were 6.609 photos taken with the drone flying at a height of 150 meters above ground level with 80% overlap. Based on the results show that there are three potential locations of reservoirs. The first potential sites of reservoir is in the area of 423 m2. The second one potential sites of reservoirs 1.415 m2 and the last one potential site of reservoirs are in area three land area of 1.191 m2.

Anak Krakatau is one of the legendary mountains which was the result of the eruption of Mount Krakatau in 1883. The Krakatau area is divided into three regions, Krakatau Island, Sertung Island, and Mount Anak Krakatau. The activity of Mount Anak Krakatau in 1929 tended to be active because in a year, Anak Krakatau could experience eight eruptions. This can be seen in visual observations starting from 1929 -2000 experiencing a fairly rapid development. At the end of 2018, Anak Krakatau erupted again, where the eruption caused a landslide to part of the mountain's side. As a result, the debris from the landslide, made the waters of the Sunda Strait unstable, thus forming a tsunami wave. The eruption did not only happen in 2018 in which recently, Anak Krakatau became active again in 2020 by releasing its volcanic ash. The activity of Anak Krakatau underlies the purpose of this study, namely knowing the formation process and activities of Mount Anak Krakatau. The analysis process used is a literature study using related journal articles and data on the cataclysmic events of the Anak Krakatau volcano eruption, so that in the future, further research can be carried out related to disaster mitigation efforts from the eruption of Mount Anak Krakatau in the area around the mountain.