四个社区（西部高地、新荷兰区、蓝球区和位于宾夕法尼亚州兰开斯特县的Terre Hill区）正在开发井口保护项目，以管理不断变化的土地利用和城市发展，保护地下水资源。裂缝追踪分析结果与地下水数学模型相结合，用于开发裂缝岩石地质的井口保护区（WHPA）划定技术。研究区域占地80平方英里，位于厄尔镇和东厄尔镇，位于农业生产力最高的非农业区- 美国的灌溉县。根据美国环境保护局（EPA）第三区和宾夕法尼亚州环境资源部（PA DER）的建议指南，为社区供水井和井场划定了初始WHPA和保护区。以下划定标准和方法适用:1区:400英尺固定半径；2区:环境保护局WHPA模型2.0版确定的10年旅行时间捕捉区内的区域；3区:根据水文地质图推断的贡献区（地表水和地下水分界线，以及含水层露头区域）。 然后，根据脆弱性映射程序对这些初始WHPA进行修改，该程序根据裂缝痕迹分析的解释扩大了3区保护区。该方法进一步细化为半分析建模技术（SAMTECH），用于描述裂隙岩石含水层中的WHPA。

Four communities (Western Heights, New Holland Borough, Blue Ball, and Terre Hill Borough, located in Lancaster County, Pennsylvania) are developing Wellhead Protection Programs to manage changing land uses and urban development to protect groundwater resources. Results of fracture trace analysis, combined with mathematical groundwater modeling, was used to develop a Wellhead Protection Area (WHPA) delineation technique for fractured-rock geology. The study area encompasses 80 square miles within Earl and East Earl Townships and is located within the most agriculturally productive, non-irrigated county in the United States. Initial WHPAs and protection zones were delineated for the community water supply wells and wellfields based upon recommended guidelines from the US Environmental Protection Agency (EPA) Region III and the Pennsylvania Department of Environmental Resources (PA DER). The following delineation criteria and methods apply: Zone 1: the 400-foot fixed radius; Zone 2: the area included within the 10-year time-of-travel capture zone determined by EPA's WHPA Model Version 2.0; and, Zone 3: the zone of contribution inferred from hydrogeologic mapping (surface water and groundwater divides, as well as aquifer outcrop areas). These initial WHPAs were then modified based upon a vulnerability mapping procedure which expanded the Zone 3 protection areas based upon interpretation of fracture trace analysis. This methodology was further refined into a semi-analytical modeling technique (SAMTECH) for delineation of WHPAs in fractured-rock aquifers.