Impact of land use on nitrogen concentration in groundwater and river water
Impact of land use on nitrogen concentration in groundwater and river water
复制标题
土地利用对地下水和河水中氮浓度的影响
DOI：
10.1080/00380768.2015.1104521
复制
发表时间：
2015
影响因子：
2
通讯作者：
H. Mochizuki
中科院分区：
文献类型：
--
作者：
S. Yoshikawa;H. Takahashi;Y. Sasada;H. Mochizuki
摘要本研究的目的是评估土地利用对浅层地下水（G-N）中硝酸盐氮（NO3-N）和河水（R-N）中总氮（N）的影响。研究区包括26个流域（1342平方公里），覆盖72%的香川县在日本。我们估计了G-N的具体浓度，这表明了高地，水田，森林和城市土地利用对流域平均G-N的贡献的大小。通过对26个流域的流域平均G-N浓度和土地利用率进行多元回归分析，得到G-N特定浓度作为偏回归系数。结果表明，高地、水田、林地和城市土地利用类型土壤G-N比浓度分别为15.2 mg L-1、10.3 mg L-1、2.3 mg L-1和2.5 mg L-1。通过将R-N比浓度（之前报道）乘以河口的河流流量来计算R-N污染负荷径流量。地下水G-N污染负荷量的计算方法为G-N比浓度乘以地下水流量。高地、稻田、森林和城市地区的R-N污染负荷径流量分别为19.3 kg ha− 1 y − 1、7.7 kg ha − 1 y−1、1.7 kg ha−1 y−1和7.6 kg ha−1 y−1，而G-N污染负荷到达量分别为7.3 kg ha−1 y −1、5.0 kg ha−1 y−1、1.1 kg ha−1 y−1和1.2 kg ha−1 y−1。结果表明，河水和地下水中的氮主要来源于径流和农田淋溶。因此，流域平均非吸收，施加的氮（NAA-N：氮通过肥料和粪便施加到农田，而不被作物吸收），R-N浓度和流域平均G-N浓度之间的关系进行了研究。NAA-N和R-N浓度之间的曲线相关性（r2 = 0.68），除了一个小的，高密度，城市流域，NAA-N和G-N浓度之间的弱线性相关性（r2 = 0.42）。
Abstract The aim of this study was to evaluate the impact of land use on nitrate nitrogen (NO3-N) in shallow groundwater (G-N) and total nitrogen (N) in river water (R-N). The study area consisted of 26 watersheds (1342 km2) covering 72% of Kagawa Prefecture in Japan. We estimated G-N specific concentrations, which showed the magnitude of the upland fields, paddy fields, forests and urban land-use contributions to watershed-mean G-N. G-N specific concentrations were gained as partial regression coefficients using a multiple regression analysis of the watershed-mean G-N concentrations and the land-use ratios in each of the 26 watersheds. The results showed that the G-N specific concentration, which was gained as the partial regression coefficient for the multiple regression analysis, was 15.2 mg L−1, 10.3 mg L−1, 2.3 mg L−1 and 2.5 mg L−1 for the upland fields, paddy fields, forests and urban land-use types, respectively. R-N pollution load runoff to the river mouth was calculated by multiplying R-N specific concentration (previously reported) by river flow at the river mouth. Similarly, G-N pollution load arrival to groundwater was calculated by multiplying G-N specific concentration by the groundwater flow. The R-N pollution load runoff was 19.3 kg ha−1 y−1, 7.7 kg ha−1 y−1, 1.7 kg ha−1 y−1 and 7.6 kg ha−1 y−1, while the G-N pollution load arrival was 7.3 kg ha−1 y−1, 5.0 kg ha−1 y−1, 1.1 kg ha−1 y−1 and 1.2 kg ha−1 y−1, for upland fields, paddy fields, forests and urban areas, respectively. These results showed that the N in river water and groundwater was derived mainly from runoff and leaching from croplands. Therefore, the relationships between watershed-mean non-absorbed, applied nitrogen (NAA-N: nitrogen applied to cropland via fertilizer and manure without being absorbed by crops), R-N concentration and watershed-mean G-N concentration were investigated. A curvilinear correlation was observed between NAA-N and R-N concentrations (r2 = 0.68) except for one small, high-density, urban watershed, and a weak linear correlation was observed between NAA-N and G-N concentrations (r2 = 0.42).
评估日本北海道中部农村地区溪流水中氮污染的点源和非点源的贡献
DOI：
--
发表时间：
2004
期刊：
Soil Sci.Plant Nutr. 50・1
影响因子：
--
作者：
Nagumo;T.
通讯作者：
T.
通过土地利用分析和畜牧业氮预算方法评估河流水质。
DOI：
--
发表时间：
2004
期刊：
Science of the Total Environment 329
影响因子：
--
作者：
Woil;K.P.;T.Nagumo;K.Kuramochi;R.Hatano
通讯作者：
R.Hatano