本文選題：河南省 + 地形��； 參考：《土壤學(xué)報(bào)》2017年03期

【摘要】：在水土資源多樣性的研究中,地形要素對其空間分布形式和內(nèi)在聯(lián)系有重要影響。選取河南省作為研究區(qū),在1 km×1 km網(wǎng)格尺度下以變形仙農(nóng)熵公式計(jì)算河南省的地形空間分布多樣性和土壤空間分布多樣性(土類級(jí)別)及關(guān)聯(lián)性,并將河南省劃分為6個(gè)面積相近的次級(jí)區(qū)域,用空間分布面積指數(shù)(Y_h)計(jì)算地形、土壤的構(gòu)成組分多樣性,用空間分布長度指數(shù)(MSHDLI)計(jì)算地表水體多樣性,對以上特征及關(guān)聯(lián)性進(jìn)行研究。結(jié)果表明:平原和潮土是河南省面積最大且空間分布離散性最高的地形類型和土類。地形與土壤之間關(guān)系密切,有76%以上的相關(guān)系數(shù)r值大于0.50,相關(guān)性高;6個(gè)分區(qū)中,東部分區(qū)為單一的平原地形但MSHDLI值次高,平原地形水系發(fā)育好,西部分區(qū)地形復(fù)雜且以山地為主但地表水體多樣性指數(shù)MSHDLI值最小,山地條件下水系發(fā)育較簡單;研究區(qū)面積相近的情況下,土類構(gòu)成組分多樣性值主要取決于土類間面積大小的均衡程度,與土類面積比例平均變化量之間呈負(fù)相關(guān),R~2值為0.94;面狀的地形和土壤構(gòu)成組分多樣性指數(shù)與線狀的地表水體多樣性指數(shù)間無明顯相關(guān)性。綜上所述,地形、土壤和地表水體三要素間關(guān)系密切,共同影響地多樣性的空間格局。
[Abstract]:In the study of the diversity of soil and water resources, topographic factors have an important influence on its spatial distribution and internal relationship. Henan Province was selected as the study area. The spatial distribution diversity of topography and soil (soil grade) and its correlation were calculated by using the deformation Shannon entropy formula under the grid scale of 1 km 脳 1 km. Henan Province is divided into six sub-regions with similar area. The topography is calculated by the spatial distribution area index (Yh), the composition diversity of soil is calculated, and the surface water body diversity is calculated by MSHDLI. The above characteristics and relevance are studied. The results show that plain and tidal soil are the topographic types and soils with the largest area and the highest spatial dispersion in Henan Province. The correlation coefficient r value of more than 76% is greater than 0.50, and the correlation is high, the eastern subdivision is a single plain terrain, but the MSHDLI value is second high, the plain topographic water system is well developed. The topography of the western subzone is complex and mountainous, but the surface water body diversity index (MSHDLI) is the smallest, the water system development is relatively simple under the mountainous condition, and the area of the study area is similar. The diversity of soil composition mainly depends on the equilibrium degree of the area between soil groups. There was a negative correlation between the average variation of soil area ratio and the value of Rn2 was 0.94.There was no significant correlation between the surface topography and soil composition diversity index and the linear surface water body diversity index. To sum up, the three elements of topography, soil and surface water are closely related to each other, and together affect the spatial pattern of land diversity.
【作者單位】： 鄭州大學(xué)水利與環(huán)境學(xué)院自然資源與生態(tài)環(huán)境研究所;
【基金】：國家自然科學(xué)基金項(xiàng)目(41571208)資助~~
【分類號(hào)】：P343;P931;S15

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