Analysis of subsidence resulting from small gasfield production in the Nether...

A piece of code to show a histogram of effective radius of fields in the Netherlands, showing that indeed they are quite small. A piece of code to test sensitivity of subsidence...一段用于绘制荷兰农田有效半径直方图的代码，可验证这类农田的有效半径确实普遍偏小；一段用于测试沉降敏感性的代码……