USACE CWMS - Chemung River Watershed

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:

- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

The Chemung River Basin is located within the states ofPennsylvania and New York. Of the 2,595 square miles that make up the basin, approximately 1,742
square miles or 67% of the basin is in New York with the remaining 853 square miles or 33% within Pennsylvania. The basin is characterized by rolling to flat-topped uplands with steep alluvial valleys.

The Chemung River extends for 46 miles from its headwaters near Painted Post in Steuben County, NY where it is formed by the confluence of the Cohocton and Tioga Rivers, to its confluence with the Susquehanna River in Pennsylvania. Besides the Tioga and Cohocton Rivers, its major tributaries include Canisteo and Cowanesque Rivers.

According to the 2010 census, the population of the Chemung River basin is approximately 223,450, which is about 5.4% of the total Susquehanna River Watershed population. Majority of the population (about 81%) resides in the portion of the watershed that lies within New York. The major population centers in New York include the cities of Hornell, Corning and Elmira. There are several levee systems within the Chemung River basin – Avoca, Addison, Bath, Corning, Painted Post, Gang Mills, Canisteo, and Elmira in New York and Athens, Elkland, Lawrenceville, and
Tioga in Pennsylvania – providing protection to population centers such as the Village of Addison, City of Hornell, Village of Bath, Gang Mills in the Town of Erwin, City of Elmira, Village of Avoca, City of Corning, Villages of Painted Post, Riverside, South Corning, Village of Canisteo in New York, and Cities of
Elkland, Lawrenceville, and Tioga in Pennsylvania.

There are five USACE dams in the Chemung River basin - Almond Dam located on Canacadea Creek, Arkport Dam located on Canisteo River, Cowanesque Dam located on the Cowanesque River, Tioga Dam located on the Tioga River, and Hammond Dam located on Crooked Creek.

军团水资源管理系统（CWMS）包含四个相互关联的模型，旨在协助流域的水资源管理：

- 地理水文模型扩展（GeoHMS）
- 水库系统仿真（ResSIM）
- 河流分析系统（RAS）
- 洪水影响分析（FIA）

切木冈河流域位于宾夕法尼亚州和纽约州境内。该流域总面积为2,595平方英里，其中约1,742平方英里，即67%位于纽约州，剩余的853平方英里，即33%位于宾夕法尼亚州。该流域地形以起伏的丘顶和陡峭的冲积河谷为特征。

切木冈河全长46英里，发源于纽约州斯图本县皮ained Post附近，由科霍科顿河和蒂奥加河汇合而成，最终在宾夕法尼亚州与萨斯奎哈纳河汇合。除了蒂奥加河和科霍科顿河外，其主要支流还包括卡尼塞奥河和卡瓦内斯克河。

根据2010年的人口普查，切木冈河流域的人口约为223,450人，约占萨斯奎哈纳河流域总人口的5.4%。其中，约81%的人口居住在纽约州的水域范围内。纽约州的主要人口中心包括霍奈尔市、科宁市和埃尔米拉市。切木冈河流域内设有多个防洪堤系统，包括阿沃卡、艾迪生、巴思、科宁、皮ained Post、甘米尔、卡尼塞奥和埃尔米拉等，在纽约州，以及雅典、艾尔克兰、劳伦斯维尔和蒂奥加等，这些防洪堤系统为包括艾迪生村、霍奈尔市、巴思村、埃文顿镇的甘米尔、埃尔米拉市、阿沃卡村、科宁市、皮ained Post、河滨、南科宁、纽约州的卡尼塞奥村以及宾夕法尼亚州的艾尔克兰市、劳伦斯维尔市和蒂奥加市等人口中心提供保护。

在切木冈河流域内，有五个美国陆军工程兵团（USACE）的堤坝，分别是位于卡纳卡迪亚溪的阿尔蒙德堤坝、位于卡尼塞奥河的阿克波特堤坝、位于卡瓦内斯克河的卡瓦内斯克堤坝、位于蒂奥加河的蒂奥加堤坝以及位于克罗克溪的哈蒙德堤坝。