Digital Elevation Model (DEM) derived first- and second-order catchments for HUC 02040102 2017

A breakthrough in water resources management occurred in 1961 when President Kennedy and the governors of Delaware, New Jersey, Pennsylvania, and New York for the first time signed concurrent compact legislation into law creating a regional body with the force of law to oversee a unified approach to managing a river system without regard to political boundaries. The members of this regional body - the Delaware River Basin Commission (DRBC) - include the four basin state governors and the Division Engineer, North Atlantic Division, U.S. Army Corps of Engineers, who serves as the federal representative. Commission programs include water quality protection, water supply allocation, regulatory review (permitting), water conservation initiatives, watershed planning, drought management, flood loss reduction, and recreation. Much of the new drilling interest taking place in northeastern Pennsylvania and southern New York is targeted at reaching the natural gas found in the Marcellus Shale formation, which underlies about 36 percent of the Delaware River Basin. Because the Marcellus Shale is considered a tight geologic formation, natural gas deposits were not previously thought to be practically and economically mineable using traditional techniques. New horizontal drilling and extraction methods, coupled with higher energy costs, have given energy companies reason to take a new interest in mining the natural gas deposits within the Marcellus Shale. In connection with natural gas drilling, the commission has identified three major areas of concern: 1.Gas drilling projects in the Marcellus Shale or other formations may have a substantial effect on the water resources of the basin by reducing the flow in streams and/or aquifers used to supply the significant amounts of fresh water needed in the natural gas mining process. 2.On-site drilling operations may potentially add, discharge or cause the release of pollutants into the ground water or surface water. 3.The recovered \"frac water\" must be treated and disposed of properly. DRBC is identifying methods, geospatial data, and other information to support decision making on how best to oversee the Marcellus Shale drilling in the Delaware River Basin (DRB).

This data is hosted at, and may be downloaded or accessed from PASDA, the Pennsylvania Spatial Data Access Geospatial Data Clearinghouse http://www.pasda.psu.edu/uci/DataSummary.aspx?dataset=1139

1961年，水资源管理领域迎来突破性进展：时任美国总统肯尼迪与特拉华州、新泽西州、宾夕法尼亚州及纽约州州长首次联合签署同步法案，正式设立具备法律效力的区域性机构，该机构可不受政治边界限制，统筹推进某河流水系的统一管理工作。该区域性机构即为特拉华河流域委员会（Delaware River Basin Commission, DRBC），其成员包括上述四个流域州的州长，以及美国陆军工程兵团北大西洋分局的工程处处长（担任联邦代表）。该委员会的工作范畴涵盖水质保护、供水分配、监管审查（许可核发）、水资源保护行动、流域规划、干旱管理、洪水减灾及休闲娱乐管理。
当前在宾夕法尼亚州东北部与纽约州南部兴起的钻探热潮，多以开采马塞勒斯页岩（Marcellus Shale）地层中的天然气为目标，该地层覆盖约36%的特拉华河流域。由于马塞勒斯页岩属于致密地质地层，传统开采技术此前被认为无法实现该天然气藏的经济且可行的开采。新型水平钻井与开采技术叠加高昂的能源成本，促使能源企业重新关注马塞勒斯页岩内的天然气藏开采。针对天然气钻探活动，该委员会已明确三大核心关切问题：其一，马塞勒斯页岩或其他地层的天然气钻探项目，可能通过削减供应天然气开采所需大量淡水的溪流与/或含水层的径流量，对流域内水资源造成显著影响；其二，现场钻探作业可能向地下水或地表水新增、排放或引发污染物释放；其三，回收的"压裂水"（frac water）必须得到妥善处理与处置。目前特拉华河流域委员会正探索各类方法、地理空间数据及其他相关信息，以支撑相关决策，实现对特拉华河流域内马塞勒斯页岩钻探活动的最优监管。
本数据集托管于宾夕法尼亚空间数据接入地理空间数据交换中心（Pennsylvania Spatial Data Access Geospatial Data Clearinghouse, PASDA），可通过以下网址下载或访问：http://www.pasda.psu.edu/uci/DataSummary.aspx?dataset=1139