The Sindu Block area in Kalibening District, Banjarnegara Regency, is a rice field area 1000 meters above sea level that often floods during the rainy season. The initial indications of the cause of flooding are high rainfall, siltation of rivers, and changes in forest land use. There is a need for research related to land use change in the Kalibening area to determine its effect on the peak discharge of the Brukah River flood. The purpose of this study is to determine the effect of land use change on the percentage of increase in peak flood discharge in the Brukah River. The calculation of peak flood discharge in this study uses the HEC-HMS application with GPM satellite rainfall data, frequency analysis using Hydrognomon, and baseflow using the Gama 1 equation. The simulation results showed that the comparison between ideal conditions and other conditions in percentage terms from Q2th, Q5th, Q10th, Q25th, and Q50th was an average of 14.1% - 10.7% for 2012 conditions, then 15.7% - 11.7% for 2020 conditions, and 22.7% - 16.1% for severe conditions. Land use changes significantly affect peak flood discharge, especially in the Brukah River in the Sindu Kalibening Block area of Banjarnegara.

<p align="justify"><span>The world of education is one of the sectors that has been affected and has undergone drastic changes in teaching and learning activities from face-to-face to online. The activities that students must participate in, namely the student study service (KKN), must also be carried out independently around their environment. In the current pandemic situation, teenagers in the village have much free time that can be filled with beneficial activities and increase knowledge and abilities, so it is necessary to carry out additional skills training. This KKN is a community service activity carried out by one of the students of the Civil Engineering Department, Faculty of Engineering, Universitas Semarang is conducting basic SketchUp software training for teenagers in RT.04 RW.01 Pepe Village, Tegowanu District, Grobogan Regency. KKN students conduct training by making videos to explain the material and doing hands-on practice from house to house with several teenagers in the village. The teenagers seemed enthusiastic and interested in the software used and in the world of civil engineering and architecture. The activity went smoothly and provided benefits in increasing knowledge and abilities after training.</span></p>

<p align="justify"><em>The people of Kuwaron Village, especially residents of RT.01 RW.04, have recently had problems of environmental damage, namely floods during the rainy season and drought during the dry season. The impact is the reduction of water catchment areas around the houses of residents of Kuwaron Village RT.01 RW.04. The purpose of this activity is to provide insight and skills regarding applying appropriate techniques for porous infiltration holes. In the hope of increasing groundwater reserves, reducing inundation, and accelerating water infiltration in residents' yards. The bio-pore-making training involved several residents of Kuwaron Village. Bio pores are made with a diameter of 10 cm and a depth of 100 cm. Then, the hole filled with organic kitchen waste. That is expected to reduce organic kitchen waste from each house because porous infiltration holes containing garbage invite various soil fauna and form pores to increase groundwater infiltration. The results of the evaluation of bio pores installation for four weeks showed that the rain puddles in the residents' yards receded faster.</em></p>