PREPARATION OF INFILTRATION WELL DEVELOPMENT PLANNING IN KADIRI UNIVERSITY AREA

Water leaked into the ground as a result of Indonesia's development, resulting in a reduction of unoccupied land. This results in frequent flooding, such as at Kadiri University in Kediri City, where flood pools are common during heavy rains. Because infiltration wells are so effective and practical, it is vital to develop infiltration wells in the area to overcome this tragedy. At Kadiri University, this research tries to eliminate or eliminate puddles. The Research Method is divided into four stages: primary and secondary data collection, second processing of parametric test distribution data, third water discharge calculation and smirnov kolmogrov test, and fourth determination of infiltration well dimensions. The investigation yielded a pattern of infiltration in the shape of a circular with a diameter of 1.4 meters and a depth of 3 meters, with a total of 153 pieces. The presence of infiltration wells is projected to lessen puddles on campus in the future.


INTRODUCTION
As the population grew, densely crowded homes had to be rebuilt [1]. The land's ability to absorb water will be reduced if development becomes more widespread [2]. This absorption is critical for flood management and preserving water availability in surface waters. [3] [4]. This type of absorption is referred to as infiltration [5].
Droughts in some locations can be overcome with the existence of infiltration wells [6]. It can also protect a healthy environmental ecology, such as clean air, healthy trees, and enough water for animals, among other things [7] [8]. Furthermore, the soil can be fertile and used by farmers for agricultural [7] [9].
There are still portions in Kediri that have been overwhelmed with water [10]. Drainage systems that need to be improved on a regular basis will consume a significant amount of funds [11]. In one of Kediri's cities, there is a Kadiri University campus that is constantly monitored for puddles when it rains. Infiltration wells are needed on the Kadiri University campus in Kediri City's Mojoroto District to aid water infiltration into the ground.
Because water cannot fully seep into the soil during the rainy season, a puddle forms in the surrounding surroundings. As a result, in order to restore the environment's function and overcome flooding at Kadiri University, infiltration wells must be built, which will be an effective approach to do so.

LITERATURE REVIEW
Infiltration wells are one of the water absorption mediums for temporarily holding water in the water surface flow so that fresh water can be kept [12]. It can increase water utilization and capacity to meet the needs of living organisms [13],. One of the water conservation methods in soil replenishing is this stage [14] [15]. The conservation is known as an infiltration well, and it is man-made for a variety of reasons, including 1) groundwater resource preservation, environmental quality enhancement, and environmental awareness cultivation. 2) Assist in the fight against the lack of safe drinking water. 3) Maintain the soil's water balance. 4) Reduce soil erosion and surface runoff.
The technical data of water infiltration wells were set as follows by Ditjen Cipta Karya Ministry of Public Works [13], 1) A diameter of 1.4 meters is included.
2) The pipe diameter that enters is 110 mm. Calculating discharge and paramater testing is required in parametric analysis. At the very least, data from the previous ten years was used [13]. Table 2 lists the parameters utilized in frequency analysis calculations.
In determining the distribution method, there are requirements that must be met according to the table below [13] ; Rainwater infiltration wells are calculated in accordance with SNI No. 03-2453-2002, and are divided into two parts: 1. the amount of rainwater that falls onto the field tanah and is released into the rainwater infiltration well. Formulas that were employed [13] [18]: 1. Volume of Flooding Vab = 0,855.Ct.Atadah.R Where: Vab = volume of flood contribution to be accommodated infiltration wells (m3), Ctadah = coefficient of runoff of the field of raindrops (without units), At = area of raindrops field (m2), R = average daily rain height (L/m2 /day) .
2. The volume of rainwater is pervasive, the following formula is used: Vrsp = te/24. Total. k, te = 0.9. R 0.92 / 60 Where: Vrsp = volume of pervasive rainwater (m3), te = effective rain duration (hours), Atotal = area of well wall + area of well base (m2), k = coefficient of soil permeability (m/day) (for impermeable well walls, kv value = kh. For non-impermeable walls, the average value is taken) 3. Rainwater storage volume Vstorasi = Vab -Vrsp [19] 4. Htotal = Vab-Vrsp / Ah, where : n = Htotal / Hrencana,n = number of infiltration wells RESEARCH METHOD Surveying locations prone to flooding during rain was used as part of the research technique. Kadiri University is an observation location in Kediri City's Kec. Mojoroto. This survey was conducted when it rained, resulting in puddles due to a lack of water suction force into the earth.
1) Primary data collection with direct termination, 2) secondary data gathered from the Office of Pu kediri's Rainfall Data for the previous ten years. Secondary data collection comes from books and journal sets. 3. Processing rainfall data with normal distribution, Normal Log, Gumbel, Log person III, 3) Calculating water discharge period   The following calculation can be seen in the distribution selection table: The terms of frequency selection according to the gumbel method's rules must be smaller than Ck < 5.4002 and Cs < 1.1396, then the normal method with the values Ck = 3 and Cs = 0, and the normal method with the rules Ck = 3 and Cs = 0 According to the following calculation for the gumbel method: The cs value, CV, and CK only qualified in the normal log based on the preceding analysis, hence distribution log person III was chosen. Then, with the following computation, complete the log person calculation.  According to the previous research, the results of the calculation of one house covering 100 m2 using a 3 m infiltration well depth can be compared to the results of the calculation of one house covering 100 m2 using a 3 m infiltration well depth.

CONCLUSION
The number of wells with dimensions of D: 1.4 m and a depth of 3 m was determined to be 153 pieces. With the completion of this research, Kadiri