We measured the amount of precipitation, stemflow, and throughfall and concentrations of nine major inorganic nutrients (H+, NH4 +, Ca2+, Mg2+, K+, Na+, Cl-, NO3 -, and SO4 2-) to investigate the nutrient inputs into soil from precipitation in Pinus densiflora and Quercus mongolica stands from September 2015 to August 2016. The precipitation inputs of H+, NH4 +, Ca2+, Mg2+, K+, Na+, Cl-, NO3 -, and SO4 2- into soil were 0.170, 15.124, 42.227, 19.218, 14.050, 15.887, 22.391, 5.431, and 129.440 kg·ha-1·yr-1, respectively. The P. densiflora stemflow inputs were 0.008, 0.784, 1.652, 1.044, 0.476, 0.651, 1.509, 0.278, and 9.098 kg·ha-1·yr-1, and those for Q. mongolica were 0.008, 0.684, 2.429, 2.417, 2.941, 1.398, 2.407, 0.436, and 13.504 kg·ha-1·yr-1, respectively. The P. densiflora throughfall inputs were 0.042, 21.518, 52.207 27.694, 20.060, 24.049, 37.229, 10.241, and 153.790 kg·ha-1·yr-1, and those for Q. mongolica were 0.032, 15.068, 42.834, 21.219, 20.294, 20.237, 24.288, 5.647, and 119.134 kg·ha-1·yr-1, respectively. Of the total throughfall flux (i.e., stemflow + throughfall flux) of the nine ions for the two species, SO4 2- had the greatest total throughfall flux and H+ had the lowest. The net throughfall fluxes of the ions for the two species had various correlations with the precedent dry period, rainfall intensity, rainfall amount, and pH of precipitation. The soil pH under the Q. mongolica canopy (4.88) was higher than that under the P. densiflora canopy (4.34). The difference in the soil pH between the two stands was significant (P < 0.01), but the difference in soil pH by the distance from the stems of the two species was not (P > 0.01). This study shows the enrichments of inorganic nutrients by two representative urban forests in temperate regions and the roles of urban forests during rainfall events in a year.

Abstract
1. Introduction
2. Methodology
    2.1. Study sites
    2.2. Precipitation water sampling
    2.3. Precipitation measurements
    2.4. Chemical analysis of precipitation
    2.5. Mineral nutrient concentrations
    2.6. Soil pH measurement
    2.7. Statistical analysis
3. Results
    3.1. Mineral nutrient inflow
    3.2. Net throughfall input and rainfall
    3.3. Influence of Quercus mongolica and Pinusdensiflora on soil pH
4. Discussion
    4.1. Precipitation, stemflow, throughfall, andinterception loss change
    4.2. Ion transport in unintercepted precipitation
    4.3. Comparison of ion inflow between rainfall andQuercus mongolica and Pinus densiflora stands
    4.4. Soil pH in the area of influence of stemflowand throughfall
    4.5. Influence of Quercus mongolica and Pinusdensiflora on net throughfall
    4.6. Implications for the relationships between dryand wet deposition
REFERENCES

• Kee Dae Kim(Department of Environmental Education, Korea National University of Education) Corresponding author