CAJ | 학술논문

综合运用RS 和GIS 技术对南京市紫金山周边小流域进行边界提取、土地利用类型分析,并且通过水样野外采集与实验室分析处理方法自2008年3月至2009年2月一年间对小流域所在水库水质进行监测.通过计算水质指数(WQI)得出其季节性变化规律,结合该小流域土地利用类型特征,揭示流域内土地利用类型与水质之间的关系.结果表明:各小流域内土地利用类型对下游水体水质影响显著.①水质指数(WQI)季节性变化主要表现在:上游有建设用地的小流域从春季到秋季期间WQI有降低趋势,从秋季到冬季又逐渐上升;而无建设用地或者建设用地面积比例较小的小流域在夏季暴雨径流的影响下,水质会逐渐改善,WQI有升高趋势.②小流域内建设用地对各小流域水体水质有负效影响.而以景观林为主的苗圃对下游水体影响不大;流域内林地、水库占流域面积越大,其下游水体水质则相对较好,对水质改善有着正效影响.
종합운용RS 화GIS 기술대남경시자금산주변소류역진행변계제취、토지이용류형분석,병차통과수양야외채집여실험실분석처리방법자2008년3월지2009년2월일년간대소류역소재수고수질진행감측.통과계산수질지수(WQI)득출기계절성변화규률,결합해소류역토지이용류형특정,게시류역내토지이용류형여수질지간적관계.결과표명:각소류역내토지이용류형대하유수체수질영향현저.①수질지수(WQI)계절성변화주요표현재:상유유건설용지적소류역종춘계도추계기간WQI유강저추세,종추계도동계우축점상승;이무건설용지혹자건설용지면적비례교소적소류역재하계폭우경류적영향하,수질회축점개선,WQI유승고추세.②소류역내건설용지대각소류역수체수질유부효영향.이이경관림위주적묘포대하유수체영향불대;류역내임지、수고점류역면적월대,기하유수체수질칙상대교호,대수질개선유착정효영향.
This study extracts the boundary of the small catchments, and analyzes of land use type of these small catchments around the Zijin Mountain in Nanjing with the aid of remote sensing, GIS techniques. Water quality was monitored from March 2008 to February 2009 by the methods of water quality collection and analyzes in the laboratory. Statistical analysis and the seasonal variation of the water quality indices (WQI) are used to illustrate the relationship between land use type and the water quality in the study area. Results show that the typical of the land use of the small catchments affect the water quality down streams obviously. ① The seasonal variation of the WQI show that all of the WQI declined from spring to autumn and it would be increased from autumn to winter except Wuming reservoir. It is because rainstorm carried lots of pollutant from the construction land to the downstream water body during summer.② Water quality would get worse when the usage of construction land got bigger and the water quality would get better when the forest land and reservoir land got bigger. So it could be concluded that the usage of construction land would obviously result in the water pollution while the usage of forests land and land would keep it down.