Heat Balance and Soil Moisture in the Loess Plateau, China

Abstract

A three-layer soil model was used for clarifying the heat balance and soil water content in the Loess Plateau, China, and applied to actual bare soil fields (Tottori Sand Dune and Shenmu District, Shaanxi Province, China). The di#erence between the observed and calculated evaporation per day was approximately *.+2 mm (/ W m ῏, ) to *.,+ mm (0 W m ῏, ). Because of its moderate mixture of sand, silt and clay, yellow loessial soil in Shenmu a#ects water retentivity and restriction of evaporation from the soil surface. The seasonal change of heat balance and soil water content was examined using meteorological data in Yulin near Shenmu. The annual means of sensible heat and latent heat flux were ,-W m ῏, and +3 W m ῏, (,-3 mm per year), respectively. The soil water content of the second and third layers remained comparatively high in winter.

Spatial Variations of Soil Moisture under Caragana korshinskii Kom. from Different Precipitation Zones: Field Based Analysis in the Loess Plateau, China

“…Forests 2016, 7,31 northwest to 500 mm in the southeast, 70% of which falls from June to September [27]. The main soil type in this area is loess and it is vulnerable to erosion [28].…”

“…The topography of the study area is hilly and gully [26], with an elevation of sampling points ranging from 927 to 1505 m above sea level. The study area is located in a continental monsoon region where the average annual precipitation ranges from 350 mm in the northwest to 500 mm in the southeast, 70% of which falls from June to September [27]. The main soil type in this area is loess and it is vulnerable to erosion [28].…”

“…The description of each sampling point is shown in Table 1. For comparative analysis, 10 abandoned lands northwest to 500 mm in the southeast, 70% of which falls from June to September [27]. The main soil type in this area is loess and it is vulnerable to erosion [28].…”

Soil Water Storage Changes within Deep Profiles under Introduced Shrubs during the Growing Season: Evidence from Semiarid Loess Plateau, China

“…The topography of the study area is hilly, with an altitude of sampling points ranging from 873.5 to 1415 m ( Table 1). The study area is located in a continental monsoon region where the average annual precipitation of the sampling points ranges from 401.7 to 584.6 mm, 70% of which falls from June to September [45]. The main soil in this area is loess and it is vulnerable to erosion [46,47] …”

Soil Microbial Community Structure in an Asian Dust Source Region (Loess Plateau)

“…Physicochemical properties of the samples are shown in Table 1. The general soil texture is sand at Yulin NW (98% of >50 μm of particle size), sandy loam (48% of >50 μm, 39% of 10-50 μm, 13% of <10 μm of particle size) at Yulin SE, and medium loam at Taiyuan and Huangling (11% of >50 μm, 50% of 10-50 μm, 39% of <10 μm of particle size) (18). For measurements of pH and total organic carbon (TOC), one gram of soil sample was suspended in 9 mL of deionized water, and shaken for 30 min at room temperature.…”