Weathering slope

Test site information (soil, water, weather, slope, wind, history)... 

Some general comments on borehole stability can now be made. Some of these comments can be generalized to the behavior of shales in other geomechanical conditions, such as in tunnel walls, dam foundations, and in weathering slopes. 

Vineyard site is important to wine quaUty and character and interacts with variety. The general climate must not be too cold, too hot, or too humid. A mild, dry climate that still induces a dormant season, like the Mediterranean area and California, is desirable. A relatively constant weather pattern year-to-year is also sought. The nearer to the limits of cold tolerance, for example, that the climate comes, the more likely are disastrous vintages. The modifying influence of close bodies of water, sun-facing slopes, or frost-resisting air drainage can make one vineyard more desirable than another nearby. 

Protected-Membrane Roofs. Primitive roofs coveted with earth and sod over sloping wood decks shingled with bark were early examples of protected-membrane roofs (PMRs). Grass and earth provided iasulation and protected the shingled deck from inclement weather. 

Type IV asphalt is not common except in very hot climates. It has softening points between 96 and 107°C with penetration at 25°C between 12 and 25 mm /10. It is for roof slopes greater than 1 per 12, and is also called special steep asphalt. Type IV asphalt is used on flashings and in hot climates to keep the roofing system from sliding off the roof in hot weather. 

Coils may be sloped to facihtate drainage. When it is impossible to do so and remain close enough to the bottom to get proper remelting, the coils should be blown out after usage in cold weather to avoid damage by freezing. 

Pitched roofs. Pitched roofs are typically sloped at a minimum of 6° to ensure the weather resistance of lapped sheeting without sophisticated seals or a waterproof membrane. Portal frames are also more liable to snap through buckling at very shallow pitches. A pitched roof means a greater dead volume to heat, although there is additional space for high-level service distribution. 

The erosion process on slopes can be envisioned as a continuum between the weathering-limited and transport-limited extremes (Carson and Kirkby, 1972 Stallard, 1985,1995a). Erosion is classified as transport limited when the rate of supply of material by weathering exceeds the capacity of transport processes to remove the material. Erosion is weathering limited when the capacity of the transport process exceeds the rate at which material is generated by weath-... 

For a given set of conditions (lithology, climate, slope, etc.), there is presumably an optimum soil thickness that maximizes the rate of bedrock weathering (Fig. 9-3) (Carson and Kirkby, 1972 Stallard, 1985). For less than optimum soil thicknesses, there is insufficient pore volume in the soil to accept all the water supplied by precipitation and downhill flow. Excess water runs off and does not interact with the subsurface soil and bedrock. In contrast, water infiltrates and circulates slowly through thick soils (especially where forested If profile thicknesses greatly... 

Fig. 9-3 Conceptual model to describe the interaction between chemical weathering of bedrock and down-slope transport of solid erosion products. It is assumed that chemical weathering is required to generate loose solid erosion products of the bedrock. Solid curve portrays a hypothetical relationship between soil thickness and rate of chemical weathering of bedrock. Dotted lines correspond to different potential transport capacities. Low potential transport capacity is expected on a flat terrain, whereas high transport is expected on steep terrain. For moderate capacity, C and F are equilibrium points. (Modified with permission from R. F. Stallard, River chemistry, geology, geomorphology, and soils in the Amazon and Orinoco basins. In J. I. Drever, ed. (1985), "The Chemistry of Weathering," D. Reidel Publishing Co., Dordrecht, The Netherlands.)...

Figure 1 indicates a typical nitroglycerin facility "inside out" wood frame construction at a concrete floor slab. Note that the exterior cant strip, the lead conductive floor cant and the wood cap are all sloped to discourage product build-up and facilitate cleaning. This assembly also indicates spray-on foam insulation as an optional construction item. At Radford AAP this is a safety approved insulation system. The insulation at Radford AAP received a chlorinated rubber paint coating for weathering. 

Figure 3 indicates a roof detail at an exterior wall. Note that the upper surfaces of joists are detailed to be sloped to minimize dust collection and that all interior joints are taped to prevent manufacturing components and product from entering joints. Exterior surfaces of insulation should receive a coating of weather-resistant paint. 

Gawler Craton, located on the edge of the Great Victoria Desert (GVD). In this part of the GVD, regolith landforms are comprised of scarce hills of weathered bedrock outcrops surrounded by sand spreads, dunes and colluvial materials the hills act as windows to the otherwise covered weathered bedrock. The outcrops themselves have been silicified and, more recently, have been overprinted with calcrete. Calcrete sampling is relatively easy on the exposed outcrops and is preferentially sampled by mineral explorers due to its near-surface location (<10-20 cm depth). However, calcrete on the colluvial slopes and in the swales is not as easily located because of concealment by GVD sand and colluvium. 

FIGURE 8.7. A 50 km intercepting gravity sewer from Dortmund to Dinslaken, Germany. The slope of the sewer is generally >0.13%. The total daily average dry-weather flow into the interceptor is 4.8 m3 s-1. 

Fat Man was the Kokura Arsenal on Kyushu Island, but poor weather conditions led to the bombing of the secondary target of Nagasaki. This bomb exploded 1650 feet above the slopes of the city with a force of 21,000 tons (21 kilotons) of TNT. 

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