Pb Pollution in Sediments of the Bijiang Watershed of Yunnan: Distribution Characteristics and Evaluation

doi:10.11924/j.issn.1000-6850.casb19010029

Abstract

Abstract:

The paper aims to understand the distribution of Pb in the sediments of the Bijiang watershed, we took the sediments in the Bijiang watershed as the study object, and analyzed the Pb pollution characteristics in the sediments of the Bijiang watershed by field investigation and statistical analysis. The results showed that: (1) the average content of Pb in the sediments of the Bijiang watershed was 1764.23 mg/kg; (2) the content of Pb in sediments was upstream>midstream>downstream; (3) the single factor pollution index of Pb in the sediments of the Bijiang watershed was extremely high, and the average single factor pollution index of upstream, midstream and downstream was 6.04, 2.51 and 2.03, respectively. Based on the comprehensive analysis of Pb content and single factor pollution index in the sediments of the basin, it is found that the pollution status of Pb in the Bijiang watershed is serious, showing an upstream>midstream>downstream trend, which is likely to affect the coastal farmland soil.

Key words: Bijiang watershed, sediment, Pb, pollution assessment, distribution characteristics, single factor pollution index

CLC Number:

X821

Han Yunchang, Zhang Naiming, Bao Li, Yang Muqing. Pb Pollution in Sediments of the Bijiang Watershed of Yunnan: Distribution Characteristics and Evaluation[J]. Chinese Agricultural Science Bulletin, 2020, 36(13): 110-114.

Figures/Tables 11

References 20

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编号	经度/°E	纬度/°N	海拔/m	编号	经度/°E	纬度/°N	海拔/m	编号	经度/°E	纬度/°N	海拔/m
D1	99.4264	26.4547	2355	D10	99.4381	26.1133	1879	D19	99.3644	25.8903	1648
D2	99.4083	26.4172	2365	D11	99.4223	26.0367	1863	D20	99.3708	25.8397	1553
D3	99.3911	26.3789	2275	D12	99.4419	26.0686	1858	D21	99.3700	25.8153	1546
D4	99.3828	26.3700	2237	D13	99.3797	26.0403	1806	D22	99.3608	25.7875	1537
D5	99.3864	26.3281	2154	D14	99.3581	26.0336	1836	D23	99.3606	25.7686	1502
D6	99.3906	26.2700	2015	D15	99.3314	25.9794	1784	D24	99.3697	25.7478	1475
D7	99.3833	26.2456	2004	D16	99.3339	25.9511	1678	D25	99.3900	25.7267	1442
D8	99.3947	26.2239	1993	D17	99.3410	25.9342	1671	D26	99.4108	25.6942	1407
D9	99.4358	26.1714	1921	D18	99.3517	25.9033	1668	D27	99.3839	25.6389	1307

编号	经度/°E	纬度/°N	海拔/m	编号	经度/°E	纬度/°N	海拔/m	编号	经度/°E	纬度/°N	海拔/m
D1	99.4264	26.4547	2355	D10	99.4381	26.1133	1879	D19	99.3644	25.8903	1648
D2	99.4083	26.4172	2365	D11	99.4223	26.0367	1863	D20	99.3708	25.8397	1553
D3	99.3911	26.3789	2275	D12	99.4419	26.0686	1858	D21	99.3700	25.8153	1546
D4	99.3828	26.3700	2237	D13	99.3797	26.0403	1806	D22	99.3608	25.7875	1537
D5	99.3864	26.3281	2154	D14	99.3581	26.0336	1836	D23	99.3606	25.7686	1502
D6	99.3906	26.2700	2015	D15	99.3314	25.9794	1784	D24	99.3697	25.7478	1475
D7	99.3833	26.2456	2004	D16	99.3339	25.9511	1678	D25	99.3900	25.7267	1442
D8	99.3947	26.2239	1993	D17	99.3410	25.9342	1671	D26	99.4108	25.6942	1407
D9	99.4358	26.1714	1921	D18	99.3517	25.9033	1668	D27	99.3839	25.6389	1307

编号	经度/°E	纬度/°N	海拔/m
N1	99.3908	26.2456	2051
N2	99.3883	26.2283	2015
N3	99.4222	26.0367	1816
N4	99.3347	25.9844	1720
N5	99.3428	25.9325	1652
N6	99.3689	25.8261	1518
N7	99.3642	25.7961	1528
N8	99.3639	25.7492	1479
N9	99.3900	25.7267	1436
N10	99.3806	25.6334	1316

编号	经度/°E	纬度/°N	海拔/m
N1	99.3908	26.2456	2051
N2	99.3883	26.2283	2015
N3	99.4222	26.0367	1816
N4	99.3347	25.9844	1720
N5	99.3428	25.9325	1652
N6	99.3689	25.8261	1518
N7	99.3642	25.7961	1528
N8	99.3639	25.7492	1479
N9	99.3900	25.7267	1436
N10	99.3806	25.6334	1316

项目	二级标准				三级标准
项目	pH<6.5	pH 6.5~7.5	pH>7.5		pH>6.5
Pb	250	300	350		500