Rainfall, stemflow, and throughfall chemistry at urban- and mountain-facing sites at Mt. Gokurakuji, Hiroshima, Western Japan

Masaaki Chiwa, Do Hoon Kim, Hiroshi Sakugawa

Research output: Contribution to journalReview articlepeer-review

33 Citations (Scopus)

Abstract

Rainfall, stemflow, and throughfall were collected from 1996 to 1999 at two types of forest sites: (1) forests near the traffic roads and urban areas and (2) forests away from the urban areas at Mt. Gokurakuji, Hiroshima, western Japan in order to estimate the effects of anthropogenic activities on atmospheric deposition. Rainfall deposition for major ions showed small differences between the sites. The NO3- and SO42- concentrations in stemflow were higher at the urban-facing slope than at the mountain-facing slope. Throughfall deposition of NO3- and SO42- was also higher at urban-facing slopes. Net throughfall (NTF) deposition (throughfall minus rainfall) of NO3- and SO42- accounted for 77 and 50% of the total throughfall deposition on urban-facing slopes, respectively, while it accounted for 44 and 23% on the mountain-facing slopes, respectively. These results indicated a higher contribution from dry deposition on urban-facing slopes compared to mountain-facing slopes. Atmospheric N (NO3- + NH4+) deposition from throughfall was estimated to be around 17-26 kg N ha-1 yr-1 on urban-facing slopes, which was greater than the threshold of N deposition that could cause nitrogen leaching in Europe and the United States. The high load of atmospheric N deposition may be one of the factors bringing about the decline of pine forests on urban-facing slopes of Mt. Gokurakuji.

Original languageEnglish
Pages (from-to)93-109
Number of pages17
JournalWater, Air, and Soil Pollution
Volume146
Issue number1-4
DOIs
Publication statusPublished - Jun 2003
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Ecological Modelling
  • Water Science and Technology
  • Pollution

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