The density with the biodiversity increasing shows " m " model. ( 3 ) the correlation analysis shows : elevation, slope, development stage and biomass are main factors which affect the biodiversity pattern in the research region. the biodiversity of the quercus aliena var. acutesrata community shows the patterns with the elevation and slope affecting : on sunny slope, the species diversity increases with the elevation increasing below the attitude of 1640m and its climax is at this attitude ( the diversity index h = 1. 68 ), upward this point, the diversity index descends slowly. the evenness shows ascend trend with the elevation upward, its climax point at 1800m ( the evenness index jsw = 0. 78 ), then descending after this point
( 5 )通過分析,銳齒棟群落生物量與生物多樣性呈現如下關系:在海拔1500一170枷范圍內,銳齒棟群落生物量與物種多樣性之間呈單峰曲線關系;在海拔1700一1900m范圍內,生物量與物種多樣性之間呈不明顯的波動關系;在海拔1900一2100m范圍內,生物量隨物種多樣性的增加而增大,通過對不同高程內生物量與物種多樣性分析發現,隨著海拔的上升,最大生物量對應的物種多樣性略有增加趨勢;在相同海拔和
坡向條件下,生物量與物種多樣性之間也呈典型的單峰曲線關系;群落凈生產力與物種多樣性之間總體上也呈單峰曲線關系。
Now you can start to coast down the slope
你現在可以開始順
坡向下滑行了。
The sledge coasted down the slope
雪橇沿著山
坡向下滑行。
By surveying the sample plot, the relations between the stabil ity of the mountai n slope of soil preparation for planting by using explosion and other factors s uch as precipitation, terrain , were studied. by using the method of quantitative t heory i, the interrelation between the damaged degrees of soil preparation progra ms by using explosion in low mountain area with abundant precipitation and terrain factors was systematically analysed, and the mathematical models relate d were developed. the results show that the precipitation in early days and the m aximum precipitation per day are the primary factors causing the soil prepara tion program damaged. the main terrain factors of the mountain slope that affect the program stability are according to their importance, slope, position and dir ection. the suitable mountain slope for soil preparation by using explosion is th e slope of less than 25
通過典型標準樣地調查資料,探討了造林爆破整地工程的
坡地穩定性與降水、地形等因子的相互關系,應用數量化理論,對在有充分降水條件下的低山丘陵區的爆破整地工程損失程度與地形因子之間的關系進行了系統分析,並建立了相應的數學模型,研究指出,充分的前期降水和日最大降雨量是引起爆破整地工程損失的激發因素;影響爆破整地工程穩定性的主要地形因子是地面
坡度,其次為
坡位、
坡向,實施爆破整地工程的地面
坡度以不超過25為宜。
( 3 ) when evaporation was stopped during the process of soil water redistribution, soil water would move downslope by gravity. when evaporation was in process, due to low initial water content, most infiltrated water from small intensity and amount of rainfall would be consumed by intensive evapotranspiration during rainy season, and lateral downslope unsaturated flow seldom took place. however, soil water would move downslope by gravitational and matric potential gradients after continuous rainfall
( 3 )在防止蒸發條件下,再分佈過程中,土壤水分在重力的作用下有沿
坡向下運移的趨勢;在蒸發條件下,由於初始含水量一般較低,雨季量小且分散的降雨極易為強烈的蒸發蒸騰所消耗,側
向沿
坡向下流難以發生,但在持續的降雨條件下,土壤水分在重力勢和基質勢梯度的作用下易沿
坡向下運移。
2. building the grid - framed dem of viet nam and the grid - layer chart with the properties of gradient and direction with geographical information system technology ( gis ) and contour line with rate of 1 : 500, 000
( 2 )採用地理信息系統技術,以及越南1 : 50萬比列尺的等高線資料,建立越南地區柵格結構的數字高程模型( dem ) ,以及屬性為
坡度和
坡向的柵格圖層。
The chief factors influencing chinese - fir ’ s dominance are slope - face and altitude ; those influencing s. superba ' s dominance are slope - degree and slope - shape ; those influencing c. eyrei ' s dominance are slope - position and slope - shape
影響杉木優勢度的首要因素為
坡向和海拔,影響木荷的首要因素為
坡度和
坡形,而影響甜櫧的首要因素為
坡位和
坡形。
Characteristics of different aspect of soil erosion in wind - water erosion crisscross region on loess plateau
黃土高原水蝕風蝕交錯帶土壤侵蝕
坡向分異特徵
After entering the narrow gap on the plateau, they climbed down the steep sides of the cave until they came to a narrow corridor.
他們進入了那個高原上的小裂口之後,沿著陡峭的洞穴斜
坡向下爬去,一直來到一條狹窄的走廊。
In the first, an academic concept of the slope spectrum was firstly put forward. the slope spectrum is defined as a statistic graph or a mathematical model with its x - axis denoting the numerical value of the slope factors ( e. g. gradient, aspect or curvature etc. ) and its y - axis the corresponding area on the ground in a specific statistic area
首先,本文提出了地面
坡譜的理論概念:地面
坡譜是指在一個特定的統計區域內,以某項
坡面因子(
坡度、
坡向或曲率等)的大小為自變量,其對應的地面面積為因變量,構成的統計圖表或模型。
The garden sloped gently downwards towards the river
花園呈緩
坡向河邊傾斜
The doctor sent back gray for one of the pickaxes, deserted, in their flight, by the mutineers ; and then as we proceeded leisurely down hill to where the boats were lying, related, in a few words, what had taken place
大夫派葛雷回去將反叛者逃跑時扔下的鎬頭拿一把來。然後我們不緊不慢地走下山
坡,
向停木船的地方走去。
He slowly, silently climbed the incline to the hall. then he came round the great trees at the top of the knoll, on to the drive, which made a grand sweep round a lozenge of grass in front of the entrance
緩慢地,靜默的,他攀登那小山
坡向著大廈走去,他走到了山攝,繞過那結大樹,踏上了繞著大廈門前那塊菱形的草地,而直達門口的那條大路。
6. the nest - site selection of great bustard is strict, it mainly selects the grassland with small hill which with gradient slow and nest above the middle parts of hill
6 、大鴇巢址選擇嚴格,多選擇在崗
坡的中部以上、
坡度較緩的草原上營巢。
坡向多選擇在朝南的陽
坡。
It decreased with the increase of the gradient. the soil moisture in sunlit slope is greater than that in sunless slope, and changes as the following order in the slope : top < middle < lower
在坡面,隨著坡度的增加,土壤含水量逐漸降低;陰坡的土壤含水量高於陽坡;而在同一坡度和坡向,土壤含水量從坡底向坡頂遞減。