Population and socio-economic growth trigger changes in land use functions. Land use and climate change in line with the increase in the rate of surface water and a decrease in the quality of water infiltration into the soil. Decreasing water absorption triggers an abundance of water on the surface which leads to hydrometeorological disasters, one of them is flooding. The research study is in Pekalongan City which has a very flat topography a nd the estuary area of several rivers from the upstream area. The current condition of Pekalongan City has a huge potential for flood disaster. The purposes of this study are to measure the depth of the groundwater level, to delineate the flooding area, and to recommend the infiltration wells based on the Geographic Information System. The methods were hydrogeological mapping, including the measurement of the water table, collecting land use maps, delineating flooding zone, calculating impermeable zones, collecting hydrological data such as precipitation . The results show that the groundwater level at the research location is classified into 3 classes, namely 0 -1.5 meters, 1.5-3 meters, and > 3 meters. The need for infiltration wells in the flood-prone areas of Pekalongan City is 57,718 units. The needs for rainwater infiltration wells in areas outside flood -prone areas and groundwater depth> 1.5 meters are 227,416 units with a well's depth between 1.5 to 4 meters. Keywords: Infiltration well, hydrometeorological, disaster Pekalongan City

Groundwater in Pekalongan City suffered vulnerability. Water catchment quality in there is already at a critical threshold. The anthropogenic and natural factors which have fluctuating rainfall stressed groundwater. There are 4580 companies, 33 accommodation services, and 318 restaurants that exert clean water for their performance. The population of Pekalongan city in 2019 has reached 307,097 people, which has increased by almost 25% of the inhabitants in 1993. The local Health Department reported that there was an increase in the morbidity rate of 27.62% compared to 2018. The increase in flooding and land subsidence had triggered a diminish in land value and engender other economic losses. This study executed with a comprehensive literature review of (1)groundwater characteristics, (2)techniques for enhancing groundwater potential, and (3)alternatives of groundwater preservation that proper it. The assessment approach leads to accelerated groundwater infiltration through cutting material with low permeability by crossing less conductive aquifer layers through the installation infrastructure with large diameters. The unit provides the ability to carry out lateral infiltration and increase water storage in the soil to support sustainability and resilience.