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Friday, January 13, 2017

Facts about Developers who want to build Houses.

Burnley Council want to allocated land such as Hollins Cross Farm for developers to build on BUT they don't want the responsibility of checking that the land is suitable and safe to build on.
WE we will hold them responsible legally when they have been supplied Facts showing that building on this site WILL cause flooding.

Hollins Cross Farm already Floods Wilkie Avenue

Flooding on Wilkie Avenue from Hollins Cross Farm - Xmas2015

Developers HAVE NO interest in improving any land drainage it CUTS into their profits. AS CHEAP as possible they can get away with.
Look at this article of developers who neglected to complete the necessary flood prevention and built in a high risk area in Whalley

Infiltration Excess Overland Flows.

Infiltration Excess Overland Flow, also known as Hortonian Flow, occurs when water enters a soil system faster than the soil can absorb or move it, such as when the rainfall exceeds the infiltration capacity of the soil. 
This process is very important in an area such as Hollins Cross Farm where dependant on dry or wet spells there is very little surface sealing at the bottom of the hill or crusting between rain events. The top part of the hill can be crusty this then adds to a the Excessive Overland Flows of water in rainstorms. 
This Infiltration Excess Overland Flow at the top part of the filed is seasonal as the land becomes soaked it then moves towards a more permanent Saturation Excess Overland Flow and the as water sinks into the structure of the land and the water table rises.

WaterCourses on Hollins Cross Farm

Saturation excess Overland Flows

Once the soils in an area such as Hollins Cross Farm starts to saturate to the surface, any additional rainfall irrespective of intensity that falls will become overland flow. The name for this process is "saturation-excess overland flow". 
Therefore the natural tendancy of an area such as Hollins Cross Farm with such a steep incline will produce a very fast runoff which is largely independent of rainfall intensity. Instead, the total rainfall amount and landscape factors such as soil depth (i.e., available water storage capacity), upland-watershed area, and local topography are the important factors determining whether or not a particular area in a watershed will generate runoff. 
Moreover, as rainfall continues the saturated area grows in extent, increasing the area generating runoff (hence the term variable source area, VSA). This is in contrast with Hortonian infiltration-excess runoff generation, which depends on soil type (infiltration rate vs. rain intensity) but is independent of position in the landscape, with the runoff generating area always the same.

 WaterCourses on Hollins Cross Farm

Antecedent soil moisture and soil infiltration capacity

Antecedent moisture conditions within the topology of an environment such as Hollins Cross Farm can change continuously and can have a very significant effect on the flow responses especially during wet weather. The Antecedent soil moisture levels and soil infiltration capacity needs to be calculated before and after a bout of rainfall and also the projected loss of soil infiltration capacity due to the reduction in the soil surface area by interruption when adding impervious surfaces into the structure of a naturally draining hillside. To explain simply when concrete, tarmac and block paving is inserted into the subsurface water flow paths, then the abilty of the ground to absorb water is damaged. 
The Result is FLOODING

THIS IS WHAT WE WILL GET at Hollins Cross Farm and Burnley WILL flood if the Council are not stopped - BUT Burnley Council will be the ones liable if they ignore all our FACTS in the Opposition Document they have accepted.

Slap on wrist for housing developer

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