CAJ | 학술논문

克亚吉尔冰川湖的突发洪水灾害是叶尔羌河流域的主要灾害之一。为了解该湖不同高程对应的湖面积和湖容积，通过GIS中的湖痕线和最新的DEM进行了等高线分析，利用拉格朗日四点插值公式查算两条相邻等高线之间高程中点对应的湖面积值，用抛物线法估算得到不同高程对应的湖面积和湖容积。结果表明：湖水位4760、4785、4810 m时对应的湖面积分别为0．089、0．378、1．082 km2，湖容积分别为10万、538万、2200万m3；2011年、2012年冰川湖容积最小为450万 m3，最大为950万 m3，冰川湖突发洪水的潜在危险等级较低。
극아길이빙천호적돌발홍수재해시협이강하류역적주요재해지일。위료해해호불동고정대응적호면적화호용적，통과GIS중적호흔선화최신적DEM진행료등고선분석，이용랍격랑일사점삽치공식사산량조상린등고선지간고정중점대응적호면적치，용포물선법고산득도불동고정대응적호면적화호용적。결과표명：호수위4760、4785、4810 m시대응적호면적분별위0．089、0．378、1．082 km2，호용적분별위10만、538만、2200만m3；2011년、2012년빙천호용적최소위450만 m3，최대위950만 m3，빙천호돌발홍수적잠재위험등급교저。
Glacial Lake outburst is one of the main hazards on the Yarkant River. For the area and volume of glacial lake corresponding with different elevations,a graphical method or a four-point Lagrange interpolation formula could be calculated area values of lake area by the mid-point between two adjacent elevation contour lines,based on database of GIS and DEM of satellite data in Kyagar Glacier Lake area. Then it used the parabolic interpolation method to calculate the volume of glacial lake corresponding with different elevations. The results show that the area and volume of Kyagar Glacial Lake with different water levels are 0. 089 km2 and 10 × 106 m3 with 4 760 m,0. 378 km2 and 538 × 106 m3 with 4 785 m,1. 082 km2 and 2 200 × 106 m3 with 4 810 m. The minimum volume of Kyagar Glacial Lake is 4. 5 × 106 m3 ,and the maximum volume is 9. 5 × 106 m3 from 2011 to 2012. The identification of the glacial lake outburst floods hazard potential is low.