Alun Kapuas Park is a city park that designated by The Park Departement as Green Open Space (RTH) in Pontianak city. In connection with the function of RTH as rainwater catchment, Alun Kapuas Park still got less attention because puddle often happens during the rainy season. This research aims to determine 1) infiltration rate when the condition is not raining and the day condition is raining, 2) the influence of soil physical characteristic and vegetation against the infiltration rate, 3) the potential of Alun Kapuas Park to absorb rainwater. Infiltration rate measurement method uses double ring infiltrometer, then it is analyzed by the method of Horton. The result of research indicate that the condition of dry day has average infiltration rate value of 5,62 cm/h greater than the condition of rainy days has average infiltration rate value of 3,20 cm/h. The highest infiltration rate value of 14,40 cm/h is point 4 with sand soil value of 64,64%, permeability value of 26,29 cm/h, and porosity value of 55,42%. Lowest infiltration rate value of 2,02 cm/h is point 3, with sand soil value of 54,41%, permeability value of 5,14 cm/h, and porosity value of 47,33%. The greater values of permeability, porosity, and the sand fraction can increase the infiltration rate. Vegetation at Point 1, Point 2 and Point 4 is dominated by trees and grass have infiltration rate greater than 3 points dominated the ground cover plants and shrubs. Potential seepage of rain for one year in Alun Kapuas Park is 37% of the total volume of rainfall amounted to 54.801 m3, so it does not fulfill the ecological functions of city park as rainwater catchment have percentage of 75-95%. Something that can be suggested is expanding the area of reforestation, choosing the composition of the vegetation right, replacing asphalt with paving blocks, and social-economic activities are not carried out in the area of reforestation.
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机译：阿伦·卡普阿斯公园（Alun Kapuas Park）是一个城市公园，被公园部指定为坤甸的绿色休憩空间（RTH）。关于RTH作为雨水集水区的功能，由于雨季经常发生水坑，Alun Kapuas公园仍然受到较少的关注。本研究旨在确定1）在不下雨和白天下雨的条件下的入渗率； 2）土壤物理特性和植被对入渗率的影响； 3）Alun Kapuas公园吸收雨水的潜力。渗透率测量方法采用双环渗透仪，然后用霍顿法进行分析。研究结果表明，干旱天的平均入渗速率值为5.62 cm / h，而雨天的平均入渗速率值为3.20 cm / h。最高渗透速率值为14.40 cm / h，是第4点，砂土值为64.64％，渗透率值为26.29 cm / h，孔隙率值为55.42％。最低渗透率值为2.02 cm / h，是第3点，沙土值为54.41％，渗透率值为5.14 cm / h，孔隙率为47.33％。较大的渗透率，孔隙率和砂分数可以增加渗透率。 1点，2点和4点的植被以树木为主，草丛的渗透率大于3点，以地被植物和灌木为主。阿伦卡普阿斯公园一年降雨的潜在渗漏量为总降雨量（54.801立方米）的37％，因此不能满足城市公园的生态功能，因为雨水集水量占75-95％。可以提出的建议是扩大植树造林的范围，选择植被的权利，用铺路砖代替沥青，并且在植树造林的地区不开展社会经济活动。
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