四川丘陵農(nóng)區(qū)地表水水質(zhì)時(shí)空變化與污染現(xiàn)狀評(píng)價(jià)
[Abstract]:In order to analyze the influence of planting and culture pattern on surface water quality in typical agricultural areas of Sichuan hilly areas, from March 2013 to February 2015, seven monitoring sections of Xiangtan River and four research points in watershed were selected in Zhongjiang County of Hilly region of Sichuan Province to study the planting area. The seasonal variation and spatial variation characteristics of CODCr,TN,NO3--N,NH4-N and TP in surface water bodies in aquaculture and breeding mixed areas were evaluated, and the present situation of surface water quality pollution was evaluated. The results showed that the main pollutants in the seven monitoring sections of Xiangtan River were CODCr,NH4-N and TP, which were 15.67%, 59.35% and 12.83% higher than the annual average, respectively. The main pollutants in high water season were TN, 19.27% higher than the annual average. The pattern of seed culture affected the spatial distribution characteristics of TN,NO3--N,NH4-N and TP concentrations in surface water, and the planting area in the mixed area of planting and culture in different culture areas. Compared with the planting area, the discharge of waste pollution from large-scale breeding of live pigs is the root cause of surface water pollution in the mixed area of breeding and breeding. The concentrations of CODCr,TN,NO3--N,NH4-N and TP increased by 17.79%, 198.15% and 132.10%, respectively. 219.85%, 567.57%. Large-scale culture has significantly improved the total pollution index of surface water and changed the type of surface water pollution. The type of surface water pollution in planting areas is the type of total nitrogen pollution with both CODCr pollution. The surface water in the culture area and the seed-culture combination area is the total nitrogen pollution type with both total phosphorus pollution and total phosphorus pollution. The water quality of the planting area and the seed-culture mixed area reached the inferior class V water quality standard, the surface water of the planting area was slightly polluted, and the surface water of the breeding area and the seed-culture mixed area affected by the aquaculture pollution was malignant pollution. The pollution degree of receiving water is aggravated by the discharge of waste pollution from live pig farming, especially from large-scale pig farms. From the point of view of water pollution control, while carrying out the control of soil and water nutrient loss, especially nitrogen loss, it is urgent to strengthen the research and application of harmless recycling technology of fecal pollution in large-scale pig breeding in the region. In order to promote the healthy development of large-scale aquaculture and the protection of ecological environment in the upper reaches of the Yangtze River in Sichuan hilly region.
【作者單位】: 四川省農(nóng)業(yè)科學(xué)院土壤肥料研究所;中國農(nóng)業(yè)科學(xué)院農(nóng)業(yè)環(huán)境與可持續(xù)發(fā)展研究所;
【基金】:國家水體污染控制與治理科技重大專項(xiàng)課題(2012ZX07104-003) 國家科技支撐計(jì)劃課題(2012BAD14B18) 農(nóng)業(yè)部公益性行業(yè)科研專項(xiàng)項(xiàng)目(20150312702) 四川省公益性農(nóng)業(yè)專項(xiàng)(2013NZ0028)
【分類號(hào)】:X52;X824
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