CAJ | 학술논문

针对黄土高原沟壑区干旱阳坡这种典型的困难立地进行因地制宜的植被恢复建设.本文选取甘肃西峰、山西吉县、陕西安塞、宁夏固原为研究区,采用25 m分辨率的DEM为数据源,基于GIS提取相关地形信息研究其干旱阳坡的地域分异特征.结果表明:①不同类型沟壑区干旱阳坡面积比例占45%～54%,表现为高塬沟壑区>过渡地带>丘陵沟壑区.②不同类型沟壑区干旱阳坡面积比例随坡度的变化规律不同,高塬沟壑区呈左偏态分布,其他样区均基本呈近似正态分布,且丘五区和过渡地带呈双峰现象.③不同类型沟壑区梁峁坡面积比例关系为:高塬沟壑区>过渡地带>丘陵沟壑区;沟坡面积比例为:丘陵沟壑区>过渡地带>高塬沟壑区;川台地面积比例为:丘五区>过渡地带>丘二区>高塬沟壑.④不同类型沟壑区各立地类型组所占的面积比例各不相同,除高塬沟壑区外基本呈阳向缓坡组>阳向陡险坡组>坡顶或沟底.研究成果可为黄土高原地区开展抗旱造林与植被重建提供理论依据.
침대황토고원구학구간한양파저충전형적곤난입지진행인지제의적식피회복건설.본문선취감숙서봉、산서길현、협서안새、저하고원위연구구,채용25 m분변솔적DEM위수거원,기우GIS제취상관지형신식연구기간한양파적지역분이특정.결과표명:①불동류형구학구간한양파면적비례점45%～54%,표현위고원구학구>과도지대>구릉구학구.②불동류형구학구간한양파면적비례수파도적변화규률불동,고원구학구정좌편태분포,기타양구균기본정근사정태분포,차구오구화과도지대정쌍봉현상.③불동류형구학구량묘파면적비례관계위:고원구학구>과도지대>구릉구학구;구파면적비례위:구릉구학구>과도지대>고원구학구;천태지면적비례위:구오구>과도지대>구이구>고원구학.④불동류형구학구각입지류형조소점적면적비례각불상동,제고원구학구외기본정양향완파조>양향두험파조>파정혹구저.연구성과가위황토고원지구개전항한조림여식피중건제공이론의거.
This paper systematically studied the drought south slopes of typical difficult site in the gullies of the Loess Plateau in order to resume and reconstruct vegetation based on the principle of local conditions. This paper took Xifeng in Gansu, Jixian in Shanxi, Ansai in Shaanxi, Guyuan in Ningxia as study areas, and used DEM with a resolution of 25 meters to research the regional differentiation characteristics of drought south slope in different type gully regions based on GIS. Results indicated that: (1) The area proportions of drought south slopes in different type gully re-gions are 45%-54%, and the ranking order is: the plateau gully region of Loess Plateau > the transitional region> the hill and gully region of Loess Plateau. (2) The distributions of drought south slopes in different types gully regions of the Loess Plateau are different. The plateau gully region of Loess Plateau has a positively skewed distribution and the other areas have an approxi-mately normal distribution. The 5th sub-region of hilly and gully regions and the transitional re-gion have a double-peak distribution. (3) The order of loess slope area proportion in the different type gully regions is the plateau gully region of Loess Plateau > the transition zone > the hill and gully region of Loess Plateau, that of gully slope area proportion is the hill and gully region of Loess Plateau > the transition zone > the plateau gully region of Loess Plateau,and that of valley flatland area proportion is the 5th sub-region of hilly and gully regions > the transition zone > the 2nd sub-region of hilly and gully regions> the plateau gully region of the Loess Plateau. (4) The area proportion of site types groups in different type gully regions except the plateau gully region of the Loess Plateau showd the following order: sunny side gentle slope group > sunny side steep risk slope group > slope top and bottom. The results can provide the scientific theory basis for drought-resistant afforestation and vegetation restoration in the Loess Plateau.