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hydrological environment
相关语句
  水文环境
    The Effects of the Performance of Water and Soil Conservation on hydrological Environment in Bijie Prefecture
    毕节地区水土保持建设对水文环境的良性效应
短句来源
  水文环境
    The Effects of the Performance of Water and Soil Conservation on hydrological Environment in Bijie Prefecture
    毕节地区水土保持建设对水文环境的良性效应
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  hydrological environment
Climato-hydrological environment inferred from Lake Baikal sediments based on an automatic orbitally tuned age model
      
Changes Of Hydrological Environment And Their Influences On Coastal Wetlands InThe Southern Laizhou Bay, China
      
Because a compulsory water-level operation was carried out in the dam lake, it was considered that the effect of the hydrological environment in the catchment area on the dam lake was relatively large in comparison with that in natural lakes.
      
The abiotic hydrological environment and the community dynamics of the fish fauna were investigated in the Ria de Aveiro, an estuarine coastal lagoon system (43 km2), which has both marine and fluvial influences.
      
The ichthyofauna and abiotic hydrological environment of the Ria de Aveiro, Portugal
      
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The construction of water and soil conservation,which concerns the durative development of society, economy and environment, plays a principal part for Bijie prefecture. The retarding and impoundey of runoff protects water and soil resources, takes changes to the sativa distribution and dynamic cycle as well as circulating process. As a result, it must take effects on the regional hydrological environment.This paper analyses the effects of the performance of the technological measure of water and soil...

The construction of water and soil conservation,which concerns the durative development of society, economy and environment, plays a principal part for Bijie prefecture. The retarding and impoundey of runoff protects water and soil resources, takes changes to the sativa distribution and dynamic cycle as well as circulating process. As a result, it must take effects on the regional hydrological environment.This paper analyses the effects of the performance of the technological measure of water and soil conservation on hydrological environment.In addition to take a control over the hydrological process of precipitation and dissipation, all the measures mentioned above can make an obvious improvement of the water quality and the utility of water . It also presents suggestions on the existing issues.

水土保持建设是毕节地区生态环境建设的主体 ,关系到全区社会、经济和环境的可持续发展 ,在减缓、拦蓄径流的同时 ,保护了水土资源 ,改变了水分的静态分布和动态循环、流动过程 ,必然对区域的水文环境产生影响。水土保持的各种措施都能在一定程度上控制降水耗散水文过程 ,明显改善水质量 ,提高水的利用效率。针对存在的问题 ,作者提出了建议。

Soil moisture is an important variable that significantly affects the hydrological environment of a region. Weibei Upland in southern part of Loess Plateau is a commercial apple base where the increase of apple planting area has seriously affected the regional water cycle. It is necessary to better understand the effects of different land use patterns on the spatial distribution of soil water contents in order to account for the balances of water and energy at Weibai dry highland. In this paper, the spatial...

Soil moisture is an important variable that significantly affects the hydrological environment of a region. Weibei Upland in southern part of Loess Plateau is a commercial apple base where the increase of apple planting area has seriously affected the regional water cycle. It is necessary to better understand the effects of different land use patterns on the spatial distribution of soil water contents in order to account for the balances of water and energy at Weibai dry highland. In this paper, the spatial heterogeneity in soil moisture at three soil depths(0~20 cm,60~80 cm,and 280~300 cm)of different land use types (farmland, apple land, and clover land ) is studied with semi-variogram at three 30 m×30 m plots at Weibai dry highland in Loess Plateau. Grid sampling method (4 m×4 m) is adopted and there are 56 sampling points in each land use types. Spherical model was used to fit the form of semi-variogram. The typical results showed that there are high degrees of spatial heterogeneity in farmland, apple land and clover land. In 0~20 cm layer, the scale of spatial heterogeneity is 9~16m, 5~12 m in 60~80 cm layer, and that is 5~10m in 280~300 cm layer. The degrees of spatial heterogeneity change with this scale. The distance of spatial autocorrelation in soil moisture is found within distances from 1~17 m. The spatial heterogeneity of autocorrelation in total spatial heterogeneity are 89.0%~95.0% (0~20 cm), 83.0%~98.0% (60~80 cm) and 85.0%~94.0% (280~300 cm) respectively, which are obviously more than that of random proportion. The scale of spatial autocorrelation increased gradually from clover land, apple land to farmland. There exist a stronger anisotropic structure in E0° and N90° directions in both farmland and clover land (0~20 cm), but apple land in the same direction are close to isotropy.

渭北旱塬是陕西省重要的苹果生产基地 ,探讨该区不同土地利用的土壤水分时空变异特征 ,对农业生产布局、种植业结构调整和减少径流、控制侵蚀具有特殊的现实意义。本文用地统计学的理论和方法 ,分析了渭北旱塬区 3种主要土地利用类型农地、苹果地和苜蓿地 3个土层深度 (0~ 2 0cm、6 0~ 80cm、2 80~ 30 0cm)的土壤水分空间变化趋势。变异函数分析结果表明 ,3种土地利用类型的土壤水分具有明显的空间变异特性。在 0~ 2 0cm土层 ,空间变异性尺度为 9~ 16m ,6 0~ 80cm土层为 5~ 12m ,2 80~ 30 0cm土层深为 5~ 10m ,空间变异性程度随尺度变化。自相关尺度为 1~ 17m ,自相关部分的空间变异性在 0~ 2 0cm、6 0~ 80cm和 2 80~ 30 0cm分别占总空间变异性的 90 0 %~ 94 0 %、84 0 %~ 98 0 %和 85 0 %~ 94 0 % ,明显大于随机部分的空间变异性。从苜蓿地、苹果地到农地 ,空间自相关的尺度逐渐增大。各向异性分析表明 ,农地和苜蓿地在表层 (0~ 2 0cm)具有明显的各向异性 ,而苹果地的土...

渭北旱塬是陕西省重要的苹果生产基地 ,探讨该区不同土地利用的土壤水分时空变异特征 ,对农业生产布局、种植业结构调整和减少径流、控制侵蚀具有特殊的现实意义。本文用地统计学的理论和方法 ,分析了渭北旱塬区 3种主要土地利用类型农地、苹果地和苜蓿地 3个土层深度 (0~ 2 0cm、6 0~ 80cm、2 80~ 30 0cm)的土壤水分空间变化趋势。变异函数分析结果表明 ,3种土地利用类型的土壤水分具有明显的空间变异特性。在 0~ 2 0cm土层 ,空间变异性尺度为 9~ 16m ,6 0~ 80cm土层为 5~ 12m ,2 80~ 30 0cm土层深为 5~ 10m ,空间变异性程度随尺度变化。自相关尺度为 1~ 17m ,自相关部分的空间变异性在 0~ 2 0cm、6 0~ 80cm和 2 80~ 30 0cm分别占总空间变异性的 90 0 %~ 94 0 %、84 0 %~ 98 0 %和 85 0 %~ 94 0 % ,明显大于随机部分的空间变异性。从苜蓿地、苹果地到农地 ,空间自相关的尺度逐渐增大。各向异性分析表明 ,农地和苜蓿地在表层 (0~ 2 0cm)具有明显的各向异性 ,而苹果地的土壤水分含量接近各向同性

Soil moisture is an important variable that significantly affects the hydrological environment of a region. Weibei Upland in southern part of Loess Plateau is a commercial apple base where the increase of apple planting area has seriously affected the regional water cycle. It is necessary to better understand the effects of different land use patterns on the spatial distribution of soil water contents in order to account for the balances of water and energy at Weibei dry highland. In this paper, the principle...

Soil moisture is an important variable that significantly affects the hydrological environment of a region. Weibei Upland in southern part of Loess Plateau is a commercial apple base where the increase of apple planting area has seriously affected the regional water cycle. It is necessary to better understand the effects of different land use patterns on the spatial distribution of soil water contents in order to account for the balances of water and energy at Weibei dry highland. In this paper, the principle and methods of geo-statistics were used to investigate the spatial heterogeneity in soil moisture at three soil depths(0~20 cm, 60~80 cm, and 280~300 cm)of different land use types (farmland, apple land, and clover land ) by calculation of semi-variogram at Weibai dry highland in Loess Plateau. Spherical model was used to fit the form of semi-variogram. The typical results showed that there are high degrees of spatial heterogeneity in farmland, apple land and clover land. In 0~20 cm layer, the scale of spatial heterogeneity is 9~16 m, 5~12 m in 60~80 cm layer, and that is 5~10 m in 280~300 cm layer. The degrees of spatial heterogeneity change with this scale. The distance of spatial autocorrelation in soil moisture is found within distances from 1~17 m. The spatial heterogeneities of autocorrelation in total spatial heterogeneity are 89.95%~94.15% (0~20 cm), 83.75%~97.64% (60~80 cm) and 85.16%~93.85%(280~300 cm), respectively, which are obviously more than that of random proportion. The scale of spatial autocorrelation increased gradually from clover land, apple land to farmland. There exists a stronger anisotropic structure in E 0° and N 90° directions in both farmland and clover land (0~20 cm), but apple land in the same direction is close to isotropy.

用地统计学的理论和方法,分析了渭北旱塬区3种主要土地利用类型农地、苹果地和苜蓿地3个土层深度(0~20、60~80、280~300cm)的土壤水分空间变化趋势。变异函数分析结果表明,3种土地利用类型的土壤水分具有明显的空间变异特性。在0~20cm土层,空间变异性尺度为9~16m,60~80cm土层为5~12m,280~300cm土层为5~10m,空间变异性程度随尺度变化。自相关尺度为1~17m,自相关部分的空间变异性在0~20、60~80和280~300cm分别占总空间变异性的89.95%~94.15%、83.75%~97.64%和85.16%~93.85%,明显大于随机部分的空间变异性。从苜蓿地、苹果地到农地,空间自相关的尺度逐渐增大。各向异性分析表明,农地和苜蓿地在表层(0~20cm)具有明显的各向异性,而苹果地的土壤水分含量接近各向同性。

 
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